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Let $F(x)= f(x^{4})$ and $G(x)=(f(x))^{4}$ and suppose that

$a^{3}=10, \quad f(a)=2, \quad f'(a)=15, \quad f'(a^{4})=13$
Find $F'(a)$ and $G'(a)$ .

$F'(a)=$
$G'(a)=$

You can earn partial credit on this problem.