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

1. 

   Step 1 (a):

   Divide $1$ by $0.5$ to find $y$.

   Step 2 (a):

   Add $x$ and $y$ together to get the bottom of the diamond.

   Answer (a):

   

• Hint (b):

  What are the factors of $10$?

  More Help (b):

  Which of those add to $7$?

3. 

   Hint (c):

   Follow the steps in part (a).

4. 

   Hint (d):

   Use the pattern above to find $xy$ and $x+y$.

   Answer (d):