A company has developed the yearly profit equation P(x, y) = -22x + 22xy-11y + 110x - 44y - 23 where x is the number in thousands of their standard product and y is the number in thousands of their deluxe product produced and sold per year and P is the profit, in thousands of dollars. a. Find the critical point and show that this is a maximum b. How many of each product should be produced to realize a maximum profit? C. What is the maximum profit?