(a) Write an expression for the function, F(x), if it is known that F'(x) = ex and F(0) = 3 . Give your answer using the form below. Hint: See example 5 in section 6.1 of the textbook. X F(X) = C+ A(t) dt a C = a = A(t) = (b) Estimate the value F(1) using the Left Hand Sum with n = 20. (Round your answer to three decimal places.**) F(1) ~