1. The time (in minutes) between telephone calls at an insurance claims office has the following exponential distribution.
f(x)=0.13e-0.13x, x≥0

2. The time (in minutes) between telephone calls at an insurance claims office has the following exponential distribution.
f(x)=0.28e-0.28x, x≥0
What is the mean time (in minutes) between telephone calls? The long-distance calls made by the employees of a company are normally distributed with a mean of 6 minutes and a standard deviation of 2 minutes.

Pls need step by step solution including the R code.