In Exercises 21–22, determine whether the points (2, 4) and/or (10, 6) are points of the given feasible regions of:

Question 4.51

21. Exercises 15, 17, and 19.

21.

Exercise 15: (2, 4): yes; (10, 6): no; Exercise 17: (2, 4): yes; (10, 6): yes; Exercise 19: (2, 4): yes; (10, 6): yes