Consider the following LP problem with two constraints: 19X + 24Y >= 456 and 9X + 11Y >= 99. The objective function is Max 19X + 25Y. What combination of X and Y will yield the optimum solution for this problem? pn O a. infeasible problem O b. 11,0 O c. unbounded problem O d. 0,9 O e. 6, 4.09091 Determine which delivery alternative would be most economical for 90 boxes of parts. Each box costs $339 and the annual holding cost is 29% of the cost. Assume 365 days per year. Overnight delivery option costs $300, and eight-day delivery option costs $125 O a. The eight-day option is at least $5 cheaper than overnight Ob. The overnight option is at least $5 cheaper than eight-day O c. The overnight option is at least $10 cheaper than eight-day O d. The eight-day option is at least $10 cheaper than overnight