Over 10000 runners competed in a large urban marathon The ti

Over 10,000 runners competed in a large urban marathon. The times of the runners follow a normal distribution. Using the information given below determine the means and the standard deviation for the runners\' times. Give your answers in hours,minutes,and seconds.

Given 16% of the runners were able to finish in less than 3hr 43min 31secs

Given 97.5% of the runners needed at least 2hr 54min 54sec to complete the marathon

What is the mean? What is the standard deviation?

I am confused on this topic so can you please give step by step process

Solution