Which regulator does the job

A list gives eight jobs in a plant and the regulator that does each one. You will sort the list, find the busiest regulator, and write a small function for Went's coleoptile test.

The idea. Each row has a job and a regulator. A regulator can have many jobs.

Your tasks.

1. Set auxin_jobs to the jobs done by auxin, in the order of the list.
2. Set busiest to the regulator that has the most jobs in the list.
3. Finish bends. A decapitated coleoptile in the dark has an auxin block on side, which is "left", "right" or "centre". It gives "right", "left" or "straight": the coleoptile bends away from the block.