How do i solve and plug in these questions on Excel?

Please show how to solve on excel for both questions A. and B.

Practice Exercises taken from textbook. 13-1. The Bardi Trucking Co., located in Cleveland, Ohio, makes deliveries in the Great Lakes region, the Southeast, and the Northeast. Jim Bardi, the president, is studying the relationship between the distance a shipment must travel and the length of time, in days, it takes the shipment to arrive at its destination. To investigate, Mr. Bardi selected a random sample of 20 shipments made last month. Shipping distance is the independent variable, and shipping time is the dependent variable. The results are as follows. (Textbook Problem 13-51) Shipment Distance (miles) Shipping time (days) 656 853 646 783 610 841 785 639 762 762 862 679 835 607 665 647 17 685 18 720 19 652 20 828 a. Determine and interpret the coefficient of determination. b. What would be the estimated shipping time for a distance of 715 miles