Could I please have some help with these two calculus question (differentials)

a. Write the equation of the line that represents the linear approximation to the following function at the given point a. b. Use the linear approximation to estimate the given quantity [ approximation - exact c. Compute the percent error in the approximation, 100. |exact) , where the exact value is given by a calculator. f(x) = e* at a = 0; f(0.03)Use linear approximation to estimate the following quantity. Choose a value of a to produce a small error. 126