Choose the One Alternative That Best Completes the Statement or Answers

Multiple Choice

Choose the one alternative that best completes the statement or answers the question.
Approximate the area under the curve and above the x-axis using n rectangles. Let the height of each rectangle be given
by the value of the function at the right side of the rectangle.
- $$f ( x ) = x ^ { 2 } - 3 x + 4 \text { from } x = 1 \text { to } x = 5 ; n = 4$$

A) 18
B) 38
C) 28
D) 48