Please provide detailed explanation and detailed steps on how your arrive at your answer, thank you

Capital Expenditure Time Interval 1.5 FY16Q1 3.1 FY16Q4 2.5 FY17Q2 2.1 FY17Q3 3.3 FY18Q2 4.1 FY18Q4 (a) Write down and compute a Riemann sum that gives the approximate total capital expenditures for fiscal years 2016-2018. Because of the missing data, your At's may have different lengths. (b) Will everyone have the same answers for part (a)? Why or why not? (c) Good news! Some of the missing data has been found. Our chart now reads: Capital Expenditure Time Interval 1.5 FY16Q1 2.0 FY16Q2 3.1 FY1604 2.5 FY17Q2 2.1 FY17Q3 3.3 FY1704 2.7 FY18Q1 3.3 FY18Q2 4.1 FY18Q4 Use a Riemann sum to approximate total capital expenditures for the three-year period. Do you think this is a better approximation than what you computed in part (a)? Why or why not