The amount of Beta rays in 10 minutes of the sun's rays is how many times the amount of IR rays in 3 minutes of the sun's rays?

The amount of Alpha rays received in two minutes is how much more/less than the amount of Radio waves received in four minutes?

How many minutes of exposure to the sun in a day would be enough to ensure that the body receives enough Vitamin D, given that the body requires 40 units of Vitamin D every day and that 30 units of Beta rays generate one unit of Vitamin D?
