From 1995 to 2002, the total fuel consumption T (in billions of gallons) by cars in the United States and the U. S. population P (in millions) can be modeled by T = -0.003x³ -0.02x² +1.3x +68 and
P= x+89 where x is the number of years since 1995. Write a function for the average amount of fuel consumed by each person from 1995 to 2002.