II. The number of plumbing repair jobs performed by Augur's Plumbing Service in each of the last three months is listed below. Show all calculations in answering the following questions. a. Is there the presence of a trend effect? Of a cyclical effect? Of a seasonal effect? Explain b. Use the textbook two period nave method to forecast jobs in August. c. Use a three-period moving average to forecast jobs in July. d. Going back in time, use a three-period moving average to forecast jobs in May