4.13) Exercise 8 - Volume Of A Droplet

What is the volume of a spherical cloud water droplet of diameter exactly 0.16 mm?

1. 0.0171572846788 m3
2. 1.60849543864e-12 m3
3. 0.00214466058485 m3
4. 2.14466058485e-12 m3

Write a program to calculate it using the math.pi variable of the module math and print the output in m3 (cubic metres).