Sequence Problem Below

(98 points) i need with 5 questions. answer definitions are welcomed, but not necessary.

What is the simplified expression for 6(2(y+x))

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.