Copy and complete each of the Diamond Problems below. The pattern used in the Diamond Problems is shown at right.  

1. 

   Hint (a):

   What are the factors of $13$?

   More Help (a):

   The sum of which two factors is $14$?

   Answer (a):

   

2. 

   Hint (b):

   What is $16$ divided by $-2$?

3. 

   Hint (c):

   What can you add to $-4.2$ to get a sum of $-3$?

4. 

   Hint (d):

   Since the product is $0$, at least one of the missing numbers must be $0$.

   Answer (d):