please answer all three questions

D Question 1 4 pts Car Sharing Yaster Car Sharing offers a membership plan with a $51 per month fee that includes 12 hours of driving each month and charges $9 for each additional hour. Let F() be the cost for a month in which a member uses a car for a hours. Then F(a) is the piecewise function F(x) = 51, for 0 S x 5 12, F(x) = mx + b. for > > 12 for some scalars m and b. Find b. Round to the nearest whole number. D Question 2 3 pts Car Sharing Jesaki Car Sharing offers a membership plan with a $45 per month fee that includes 10 hours of driving each month and charges $9 for each additional hour. Let F(z) be the cost for a month in which a member uses a car for I hours. Consider the following limits. 1. lim F(x) z-+10* 2. lim F(x) z-+10 3. lim F(x) z-+10 Compute 3. Round to the nearest cent. Enter O if the limit does not exist. Q E X Volume Discount Jester Apparel sells custom promotional shirts. The table below shows the volume discount offered by the company, where x is the volume of a purchase in dollars. Table: Volume Discount (Excluding Tax) Volume ($x) Discount Amount $300