need help with this question please!

The amount of time passing between successive customer check-ins to a downtown Calgary hotel can be modeled by an exponential distribution with a mean of 12 minutes. (a) What can you say about the distribution of the time passing between the successive check-ins of customers at this downtown Calgary hotel? A. The distribution is left-skewed with a mean of 12 minutes and a standard deviation of 12 minutes OB. The distribution is right skewed with a mean of 12 minutes and a standard deviation of 144 minutes? C. The distribution is loft-skewed with a mean of 12 minutes and a standard deviation of 144 minutes? D. The distribution is symmetrical with a mean of 12 minutes and a standard deviation of 12 minutes E. The distribution is left skewed with a mean of 12 minutes and a standard deviation of 3.46 minutes. F. The distribution is right-skewed with a mean of 12 minutes and a standard deviation of 3.46 minutes. G. The distribution is right-skewed with a mean of 12 minutes and a standard deviation of 12 minutes. (b) Compute the probability that the amount of time passing between the arrival of successive customers who check-in is: less than 6 minutes (Round to at least four decimals in your answer) (l) between 9.5 and 20 minutes. (Pound to at least four decimals in your answer i) more than 28 minutes (Round to at least four decimals in your answer) (c) 12 minutes have passed since the last customer checked-in, what is the probability that at least another 15 minutes will pass until the next customer check-in to this hotel? (Round to at least four decimals in your answer) (d) 90% of the time, the number of minutes passing between successive customer checkins is at most how many minutes