I need to filter the df based on 2 criteria: where Name != jack and ignore all dates for jack where Date <= 2020-04-01

```
 # List of Tuples
df =       [ ('jack', 'Apples' , '2020-01-01') ,
             ('Riti', 'Mangos' , '2020-02-01') ,
             ('Aadi', 'Grapes' , '2020-03-01') ,
             ('jack', 'Oranges', '2020-04-01') ,
             ('Lucy', 'Mangos' , '2020-05-01') ,
             ('jack', 'Apples' , '2020-12-01')
              ]
#Create a DataFrame object
df1 = pd.DataFrame(df, columns = ['Name' , 'Product', 'Date']) 
df1

```

Expected result being:

```
    Name    Product Date
0   Riti    Mangos  2020-02-01
1   Aadi    Grapes  2020-03-01
2   Lucy    Mangos  2020-05-01
3   jack    Apples  2020-12-01

```