% of $40 = $30

help again its for a quiz​

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

Which one ? is the answer and how to find this answer

What is the effect on the graph of the function f(x)=x when f(x) is replaced with -f(x)+4