What is the value of $b$?

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Triangle QRS is similar to triangle FGH such that Q, R, and S correspond to F, G, and H, respectively. Each side of triangle FGH has the length of its corresponding side in triangle QRS times

\frac{1}{4}

. In triangle FGH, the measure of angle F is

3 5^{\circ}

, the measure of angle G is

b^{\circ}

, and

F G = 5

. In triangle QRS,

QR = 20

What is the value of

b