The left, right, trapezoidal, and midpoint rule approximations were used to estimate y = f(x) (a) Which rule produced which estimate? L = R= T = M = smaller value larger value (b) Between which two approximations does the true value of 0 of [²r(x) dx (x) dx lie? f(x) dx, where fis the function whose graph is shown. The estimates were 0.7812, 0.8686, 0.8631, and 0.9560, and the same number of subintervals were used in each case.