Question 4: AutoFish
The Problem
You've built an amazing fish-catching robot, but you've discovered one small flaw: the robot can't decide whether to fish or cut bait.
You've designed a language for the Control of Oceangoing Devices (COD) which you plan to use to program the robot. COD has three instructions:
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fish Fish for ten minutes. bait Cut bait for ten minutes. lunch No operation for ten minutes.
Bait is required to catch fish. The robot must cut bait for twenty minutes (execute two bait instructions) to generate a single bait unit, enough bait to catch a single fish. Other instructions (fish