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1. For problem 1, the function f is given by a graph, and A(x) = ], f(t)dt. Use Figure 12 (reproduced from chapter 4.4 p. 6) to answer parts a-d. Figure 12 Reproduced from section 4.4 p. 6 of the text y = f(t) N Fig. 12 (a) Graph y = A(x) for 1 x $ 5. Figure 13 Blank graph to plot part (a). A(x) (b) Estimate the values of the following: a. A(1) = b. A(2) = C. A(3) = d. A(4) = (c) Estimate the values of the following: a. A'(1) = b. A'(2) = C. A'(3) = d. A'(4) =