The percent increase in sales for the last 4 years at Combs Cosmetics were: 4.91,5.75, 8.12, and 21.60.(a) Find the geometric mean percent increase.(b) Find the arithmetic mean percent increase.(c) Is the arithmetic mean equal to or greater than the geometric mean?(d) Production of Cablos trucks increased from 23,000 units in 1986 to 120,520 units in 2006. Find the geometric mean annual percent increase.