#include <bits/stdc++.h>
using namespace std;
int N, Q;
vector<int> sex;
vector<int> Fn;
int Xn;
vector<int> X;
map<int, int> dx;
vector<vector<int> > adj;
vector<vector<int> > par;
vector<int> dep;
vector<int> tin, tout, arr;
int timer = 0, sq;
void dfs(int u, int p) {
  tin[u] = timer++;
  arr.push_back(u);
  par[0][u] = p;
  for (int i = 1; i < 20; i++) {
    int t = par[i - 1][u];
    if (t == -1) break;
    par[i][u] = par[i - 1][t];
  }
  for (int i = 0; i < adj[u].size(); i++) {
    int v = adj[u][i];
    if (v == p) continue;
    dep[v] = dep[u] + 1;
    dfs(v, u);
  }
  tout[u] = timer++;
  arr.push_back(u);
}
int LCA(int a, int b) {
  if (dep[a] < dep[b]) swap(a, b);
  int diff = dep[a] - dep[b];
  for (int i = 0; i < 20; i++) {
    if (diff & (1 << i)) a = par[i][a];
  }
  if (a == b) return a;
  for (int i = 20; i--;) {
    if (par[i][a] != par[i][b]) {
      a = par[i][a];
      b = par[i][b];
    }
  }
  return par[0][a];
}
struct Query {
  int a, b, x, id;
  bool operator<(const Query &i) const {
    return a / sq == i.a / sq ? b < i.b : a < i.a;
  }
};
vector<Query> query;
vector<long long> ans;
vector<int> chk;
vector<int> cnt[2];
long long sum;
int lpos, rpos;
void add(int idx, int t) {
  int u = arr[idx];
  if (chk[u]) {
    sum -= 1LL * cnt[0][Fn[u]] * cnt[1][Fn[u]];
    cnt[sex[u]][Fn[u]]--;
    sum += 1LL * cnt[0][Fn[u]] * cnt[1][Fn[u]];
  } else {
    sum -= 1LL * cnt[0][Fn[u]] * cnt[1][Fn[u]];
    cnt[sex[u]][Fn[u]]++;
    sum += 1LL * cnt[0][Fn[u]] * cnt[1][Fn[u]];
  }
  chk[u] ^= 1;
}
int main() {
  scanf("%d", &N);
  sex.resize(N);
  for (int i = 0; i < N; i++) {
    scanf("%d", &sex[i]);
  }
  Fn.resize(N);
  for (int i = 0; i < N; i++) {
    scanf("%d", &Fn[i]);
    X.push_back(Fn[i]);
  }
  sort(X.begin(), X.end());
  X.resize(unique(X.begin(), X.end()) - X.begin());
  Xn = X.size();
  for (int i = 0; i < Xn; i++) dx[X[i]] = i;
  for (int i = 0; i < N; i++) Fn[i] = dx[Fn[i]];
  adj.resize(N);
  for (int i = 0; i < N - 1; i++) {
    int u, v;
    scanf("%d %d", &u, &v);
    u--;
    v--;
    adj[u].push_back(v);
    adj[v].push_back(u);
  }
  par = vector<vector<int> >(20, vector<int>(N, -1));
  dep = vector<int>(N, 0);
  tin = tout = vector<int>(N, -1);
  dfs(0, -1);
  sq = sqrt(timer);
  scanf("%d", &Q);
  for (int i = 0; i < Q; i++) {
    int a, b;
    scanf("%d %d", &a, &b);
    a--;
    b--;
    if (tin[a] > tin[b]) swap(a, b);
    int x = LCA(a, b);
    if (a == x)
      query.push_back({tin[a], tin[b], -1, i});
    else
      query.push_back({tout[a], tin[b], tin[x], i});
  }
  sort(query.begin(), query.end());
  ans = vector<long long>(Q, 0);
  for (int i = 0; i < query.size(); i++) {
    if (i == 0 || query[i].a / sq != query[i - 1].a / sq) {
      chk = vector<int>(N, 0);
      cnt[0] = cnt[1] = vector<int>(Xn, 0);
      sum = 0;
      lpos = query[i].a;
      rpos = query[i].a;
      add(lpos, 1);
    }
    while (rpos < query[i].b) rpos++, add(rpos, 1);
    while (lpos < query[i].a) add(lpos, 0), lpos++;
    while (lpos > query[i].a) lpos--, add(lpos, 1);
    if (query[i].x != -1) {
      add(query[i].x, 1);
    }
    ans[query[i].id] = sum;
    if (query[i].x != -1) {
      add(query[i].x, 0);
    }
  }
  for (int i = 0; i < Q; i++) {
    printf("%lld\n", ans[i]);
  }
}
