Let f(x) be a continuous function with f(4)=3, f'(4)=5 and f''(4)=-9 a) Find the equation of the tangent line to h(x)=2f(x)+7 at x=4 b) Is g(x)= (x^2)/f(x) increasing or decreasing at x=4? c) Find k'(2) where k(x)=f(x^2) d) Find m'(4) where m(x)=e^-f(x) e) Is j(x)=(f(x))^2 concave up or concave down at x=4?