Question 11 (5 points) A coffee shop sells regular coffee in three sizes. The table shows the sizes of each regular coffee sold throughout the day. Write and solve a system of equations to determine the price of each regular coffee. Time Bajo Mediano Grande Earnings ($) 5-10 54 294.12 10-3 17 22 25 117.89 3-8 30 23 29 148.87 bajo: $1.60; mediano: $1.82; grande: $2.00 O bajo: $1.61; mediano: $1.77; grande: $2.03 O bajo: $1.62; mediano: $1.80; grande: $2.03 bajo: $1.65; mediano: $1.79; grande: $2.07 Question 12 (5 points) Find the maximum and minimum values of the objective function f(x, y) and for what values of x andy they occur, subject to the given constraints. Ax, y) = 2x + 6y x20 720 2x + 7y = 70 8x + 4y = 136 OOOO max at (14, 6) = 64, min at (0, 0) = 0 max at (15, 9) = $4, min at (0, 0) = 0 max at (0, 10) = 60, min at (0, 0) = 0 max at (17, 0) = 34, min at (0, 0) = 0Question 9 (5 points) Determine whether A = -2 -3 and 3 - are inverse matrices. 2 -2 No Yes Question 10 (5 points) Solve the matrix equation by using inverse matrices. O ( 1. - 7) O ( 4, 5 ) O ( 1, - 5 ) O (-1, 5 )