They are all related, I need help. Thanks

There is 60 m of fencing to go around and through the middle of a rectangular garden to keep rabbits out of one part and to keep two chickens in the other part. In order to find the maximum area enclosed , do the following steps. 22. An equation for the total fence length is a. A = xy b. 60 - 3y + 2x c. (3y)(2x) = 60 d. 2x7 + 3y -60 e. none of the above Math 1P97 Final Examination July 2011 page 7 of 16 23. An equation for the enclosed area in terms of x is a. A - 2x +3y b. A = 60 - xy C. A - 60 - 2x - 3y d. 4 - 20x 4 e. none of the above 24. A critical point of the function is a. x = 14 m b. x - 8 m C. x - 6.67 m d. x = 16.67 m e. x = 15 m 25. The max area enclosed is a. 85.6 m b. 120 m? c. 93.7 m d. 150 m