PROBLEM SET 11.4C

*1. Consider Example 11.4-2.

(a) Does it make sense to have X4 > O?

(b) For each of the following two cases, determine the feasible ranges for ZJ, Z2, Z3, Xl> X2, and X3' (You will find it helpful ,to represent each situation as in Figure 11.10.)

(i) Xl = 4 and all the remaining data are the same.

(ii) XI = 0, D} = 5, D2 = 3, and D3 = 4.