I am having some trouble with these problems

1)Suppose the line tangent to the graph of f at x=4 is y=3x+2 and suppose y=5x1 is the line tangent to the graph of g at x=4. Find the line tangent to the following curves at x=4

A) The equation of the line tangent to the curve y=f(x)g(x) at x=4 is y=

B)The equation of the line tangent to the curve y=f(x)/g(x) at x=4 is y=

2) Use linear approximation to estimate the following quantities. Choose a value of a to produce a small error.

A) Square root of 52

B) ln(0.94)

C) e^0.09

3) Consider the following functions and express the relationship between a small change in x and the corresponding change in y in the form dy=f(x)dx.

A) f(x)=9x+2

B) f(x)=e^8x

C) f(x)=3x^3-5x

D) f(x)=cot7x