What is blood made of?

A person has 5.5 litres of blood. You will find the volume of each part from its share, check that the shares make 100%, and find the largest part. Then the program draws a pie chart.

The idea. The volume of a part is its share, as a fraction, of the whole volume.

Your tasks.

1. Set volumes to the volume of each part, in litres.
2. Set total_share to the sum of the shares.
3. Set largest to the name of the part with the largest volume.