Can anyone me with these 3 problems?

1. let f(x) = 4x+7 and g(x) = 3x-5. find (g.)

a. -64
b.-61 < i think it's this one
c.-9
d.-32

2. let f(x)=3x+5 and g(x)=-4x+7. find (f.)

a. 74
b. -7
c. 23 < i think it's this one
d. 35

3. let f(x)=4x+3 and g(x)=-2x+5. find (g. f)(5)

a.-17 < i think it's this one
b.23
c.-5
d.-41

would be very !

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