M-a=n+p , for a indicated variable

What could explain what happened when the time was equal to 120 minutes

Benito is selecting samples of five values from the table, which row will result in the greatest mean? population data row 1 4 2 2 3 3 row 2 3 3 4 3 2 row 3 2 4 3 4 3 row 4 3 4 4 7 3 row 1 row 2 r

If 1/√5+1/√5+1=p+q√r , find the values of p, q and r