solve for parts

Some statistics students estimated that the amount of change daytime statistics students carry is exponentially distributed with a mean of $0.72. Suppose that we randomly pick 25 daytime statistics students. Part (a) In words, define the random variable X. O the number of daytime statistics students who carry change O the amount of change that a daytime statistics student carries O the total amount of money that a daytime statistics student carries O the number of coins that a daytime statistics student carries Part (b) Give the distribution of X. X - Part (c) In words, define the random variable X. O the average amount of money a daytime statistics student carries O the average number of daytime statistics students who carry change O the average amount of change a daytime statistics student carries O the average number of daytime statistics students Part (d) Give the distribution of X. (Round your standard deviation to three decimal places.) X