For the function, do the following.

f(x) =8xfroma=1tob=2

Exercise (a)

Approximatethe area under the curve fromatobby calculating a Riemann sum using 5 rectangles. Use the method described inExample 1 on page 351.

Exercise (b)

Find theexactarea under the curve fromatobby evaluating an appropriate definite integral using the Fundamental Theorem.