Three siblings each receive money for a holiday and then spend it at a constant weekly rate. The graph describes Abigail's spending, the table discribes Zachery's spending, and Christopher's spendings is shown by the equation y=-22.5x+90.

a. which sibling recived the most money? How much did they receive?

b. Which sibling spened money at the fastest rate? At what rate did they spend their money?

c. Which sibling runs out of money first? When did they run out?