Growth of a root

A bean root was measured once a day for a week. You will find how much it grew each day, its average daily growth, and the day it grew fastest. Then the program draws the growth.

The idea. The growth on a day is that day's length minus the length the day before. The apical meristem at the root tip makes it.

Your tasks.

1. Set growth to the growth on each day, from day 1 to day 6.
2. Set average to the mean daily growth.
3. Set fastest_day to the day with the largest growth.