Living or dead

A list gives the cells of xylem and phloem. Each row has the cell, its tissue and whether it is alive at maturity. You will pick out the dead cells, count the living ones, and find a share.

The idea. Most cells of the xylem are dead, and most cells of the phloem are living. The list shows the exceptions.

Your tasks.

1. Set dead to the names of the dead cells, in the order of the list.
2. Set living_phloem to the number of phloem cells that are alive.
3. Set share_dead to the per cent of all the cells in the list that are dead.