8) A table of values for h(t) on the interval [0, 10] is shown below. Use a left-endpoint rectangle approximation with four subintervals to estimate the value of J."hit) at . 0 2 5 9 10 h(0) -3 0 8 9) A function y(x) is increasing and has upward concavity on the interval [-2, 3]. Would a trapezoidal approximation result in an over- or under-estimation of J y(x)dx ? 10) An area is approximated to be 14 in " using a left-endpoint rectangle approximation method. A right- endpoint approximation of the same area is equal to 21 in ". Assuming the same number of equal subdivision for all approximation methods, what would the result of a trapezoid approximation for the area