Find the cumulative distribution function F and the density function f for each of the random variables

Question:

Find the cumulative function F and the density function f for each of the random variables R, S, and T in Exercise 12.
Distribution
The word "distribution" has several meanings in the financial world, most of them pertaining to the payment of assets from a fund, account, or individual security to an investor or beneficiary. Retirement account distributions are among the most...