For questions 13 from Objective 4, your solution should be similar to the Numerical Methods Section 10.5 starting on P 475 of your text. 13. R is the area under y = x + 1 from 0 to 6 (a) Calculate the area of R using the formula for the area of a trapezoid. (b) Approximate the area of R by dividing it up into six subintervals of equal width and summing the areas of inscribed rectangles (use right hand endpoints). Give answer correct to three decimals