Given f(z, y) = 2x3y + 5y2 + 713, find at = = 2 and y = 2. O a. 132 O b. 87 O c. 143 O d. 62The demand in dollars for pens is p = 2000 - 10q + q2 and the total cost function in dollars is C(q) = q2 - 1200q + 100, where q represents the number of pens. Which of the options below represents the revenue function R(q) ? O a. 2000 - 10q O b. 2000q - 10q2 O c. 2q - 1200 O d. 2000q - 10q2 + q3Given f(x, y) = 2x'y + 5y2 + 723, find of at x = 2 and y = 2. O a. 132 O b. 87 O c. 143 O d. 62