In problem 4, the function f is given by a graph, and A(x) = J f(t) at . (a) Graph y = A(x) for 1 s x $5. (b) Estimate the values of A(1), A(2), A(3), and A(4). (c) Estimate the values of A'(1), A'(2), A'(3), and A'(4). 4. f in Fig. 14. y = f(t) 3 N 1 2 3 4 5 Fig. 14