Refer to the plots of Exercise 3-2 and determine graphically whether the following directions appear to be feasible at the points indicated.

(a) x = 1 -5, 52 at x112 of 3-2(a)

(b) x = 10, 12 at x132 of 3-2(a)

(c) x = 1 -10, 02 at x132 of 3-2(a)

(d) x = 1 -3, -22 at x122 in 3-2(b)

(e) x = 12, 52 at x132 in 3-2(b)

(f) x = 1 -1, -102, at x142 in 3-2(b)