2. Consider the following integral. Z 4 1 √ x dx (a) Would a left-hand sum lead to an overestimate or underestimate of the true value of the integral? How about a right-hand sum? Explain. (b) Use a left-hand sum with n = 3 to estimate the integral. (c) Use a right-hand sum with n = 6 to estimate the integral. (d) Use your calculator to compute the true value of the integral.