Which colour does the air scatter most?

Very small particles scatter light in proportion to $\dfrac{1}{\lambda^4}$. You will make the program find how many times more each colour is scattered than red light ($700\ \text{nm}$), find the colour scattered most, and find the wavelength scattered exactly twice as much as red. Then it draws the result as bars.

Your tasks.

1. Inside the loop, work out k, how many times more the colour is scattered than red.
2. Find top, the name of the colour scattered the most.
3. Find twice, the wavelength in nanometres that is scattered twice as much as red.