Pls help me will give BRAINLIEST

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.

This is so hard and it’s for a test

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2