20. Most computer languages have a function that can be used to generate random numbers. In Microsoft's Excel, the RAND function can be used to generate random numbers be- tween 0 and 1. If we let x denote the random number generated, then x is a continuous random variable with the probability density function: f(x) = {10 for 0 x 1 elsewhere a. Graph the probability density function. b. What is the probability of generating a random number between 0.25 and 0.75? c. What is the probability of generating a random number with a value less than or equal to 0.30? d. What is the probability of generating a random number with a value greater than 0.60?