I need help pls hurry ​

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

The graph represents the gallons of water in a water tank with respect to the number of hours since it was completely filled

Ineed me i stuck and i don’t want to get it wrong