Solve for the missing lengths. Show all work.

1. $ΔGHI \sim ΔPQR$     

   Hint (a):

   $\frac{2}{n} \ = \ \frac{7}{112}$

   Answer (a):

   $32$

2. $ΔABC\simΔXYZ$     

   Hint (b):

   $\frac{7}{m} \ = \ \frac{23}{49}$