The operations manager for a local bus company wants to decide whether he should purchase a small, medium, or large new bus for his company. He estimates that the annual profits $($in $$000)$ will vary depending upon whether passenger demand is low, moderate, or high, as follows.

Demand

Bus Low Medium High

Small $506070$

Medium $408090$

Large $2050120$

If he uses the Minimax regret criterion, which size bus will he decide to purchase?

Question $5$ options:

Small

Medium

Large

Either small or medium

Either medium or large