Need part B answered. it isn't 6.1. Please don't answer unless you understand how to do this problem. Thanks

Marianne Kramer, the owner of Handy Man Rentals, rents carpet cleaners to contractors and walk-in customers. She is interested in arriving at a forecast of rentals so that she can order the correct quantities of supplies that go with the cleaners. Data for the last 10 weeks are shown here. a. Prepare a forecast for weeks 6 through 10 by using a 4-week moving average. (Enter your responses rounded to two decimal places.) What is the forecast for week 11 ? rentals. (Enter your response rounded to two decimal places.) b. The as of the end of week 10 is rentals. (Enter your response rounded to two decimal places.)