Consider Example 4.6. Examine whether the current basis (i.e. the one of the optimal

(solution) would remain unchanged under each of the two cases:

(a) The profit per unit of P1 increases to Rs 90, and the profit per unit of P4 decreases to Rs 62.

(b) The unit profit for P1 increases to Rs 110, while for P4, it increases to Rs 135.