Let f be the function defined by f (x) = 5 vx. If three subintervals of equal length are used, what is the value of the midpoint Riemann sum approximation for 10 5vx dx? Round to the nearest thousandth if necessary. 15 If f (ac) = 32 - 3x, evaluate Ef k=1Let f be the function graphed below. If 25 subintervals of equal length are used, write a summation that would represent a right Riemann sum approximation of 6 f(x) dx