#include <bits/stdc++.h>
using namespace std;
const long long linf = 1e18 + 5;
const int mod = (int)1e9 + 7;
const int logN = 17;
const int inf = 1e9;
const int N = 2e5 + 5;
const int SQ = 320;
int pp[N];
long long print[N];
int a[N], n, m, x, y, z, lca[N][logN + 1], depth[N], T, start[N], finish[N],
    w[N], cnt[2][N], h[N];
vector<pair<pair<int, int>, pair<int, int> > > Q;
map<int, int> H, W;
vector<int> v[N];
long long ans;
bool cmp(pair<pair<int, int>, pair<int, int> > x,
         pair<pair<int, int>, pair<int, int> > y) {
  if (x.first.first / SQ == y.first.first / SQ)
    return x.first.second < y.first.second;
  return x < y;
}
void dfs(int node, int root) {
  depth[node] = depth[root] + 1;
  lca[node][0] = root;
  start[node] = ++T;
  w[T] = node;
  for (__typeof(v[node].begin()) it = v[node].begin(); it != v[node].end();
       it++)
    if (*it != root) dfs(*it, node);
  finish[node] = ++T;
  w[T] = node;
}
int LCA(int x, int y) {
  if (depth[x] < depth[y]) swap(x, y);
  int diff = depth[x] - depth[y];
  for (int i = 0; i <= logN; i++)
    if (diff & (1 << i)) x = lca[x][i];
  if (x == y) return x;
  for (int i = logN; i >= 0; i--)
    if (lca[x][i] != lca[y][i]) x = lca[x][i], y = lca[y][i];
  return lca[x][0];
}
void add(int x) {
  int node = w[x], y = pp[node];
  if (h[node]) {
    ans -= cnt[!y][a[node]];
    cnt[y][a[node]]--;
  } else {
    ans += cnt[!y][a[node]];
    cnt[y][a[node]]++;
  }
  h[node] = h[node] ^ 1;
}
void del(int x) { add(x); }
int main() {
  scanf("%d", &n);
  for (int i = 1; i <= n; i++) {
    scanf("%d", &pp[i]);
  }
  for (int i = 1; i <= n; i++) {
    scanf("%d", &a[i]);
    H[a[i]] = 1;
  }
  int s = 0;
  for (__typeof(H.begin()) it = H.begin(); it != H.end(); it++)
    W[it->first] = ++s;
  for (int i = 1; i <= n; i++) a[i] = W[a[i]];
  for (int i = 2; i <= n; i++) {
    scanf("%d %d", &x, &y);
    v[x].push_back(y);
    v[y].push_back(x);
  }
  dfs(1, 0);
  for (int i = 1; i <= logN; i++)
    for (int j = 1; j <= n; j++) lca[j][i] = lca[lca[j][i - 1]][i - 1];
  scanf("%d", &m);
  for (int i = 1; i <= m; i++) {
    scanf("%d %d", &x, &y);
    if (start[y] <= start[x] && start[x] <= finish[y])
      Q.push_back(make_pair(make_pair(start[y], start[x]), make_pair(i, 0)));
    else {
      int t = LCA(x, y);
      if (finish[x] > start[y]) swap(x, y);
      Q.push_back(make_pair(make_pair(finish[x], start[y]), make_pair(i, t)));
    }
  }
  sort(Q.begin(), Q.end(), cmp);
  int l = 1, r = T;
  for (__typeof(Q.begin()) it = Q.begin(); it != Q.end(); it++) {
    int x = it->first.first, y = it->first.second, c = it->second.second;
    while (r < y) {
      add(++r);
    }
    while (l < x) {
      del(l++);
    }
    while (l > x) {
      l--;
      add(l);
    }
    while (r > y) {
      del(r);
      r--;
    }
    if (c) add(start[c]);
    print[it->second.first] = ans;
    if (c) del(start[c]);
  }
  for (int i = 1; i <= m; i++) printf("%lld\n", print[i]);
  return 0;
}
