Solve the Problem $f$ Varies Jointly As $\mathrm { q } ^ { 2 }$

Multiple Choice

Solve the problem.
-If $f$ varies jointly as $\mathrm { q } ^ { 2 }$ and $h$ , and $f = 64$ when $q = 4$ and $h = 2$ , find $f$ when $q = 2$ and $h = 5$ .

A) 20
B) 10
C) 40
D) 8