1. Let f(x) = 1-2\\al (a) Compute the left Riemann sum L; and right Riemann sum Rs for the function f(x) = 1- 2 x| on the interval [=1, 2]. (b) Use the fundamental theorem of calculus to compute the definite integral A = [ f(x)dx and the average value a of f (x) on [-1, 2]. State whether the Riemann sums from the previous part are over- or under- estimates of A