One fifths of todays college students began using computers between the ages of 5 and 8.if a college has 3500,how many students began using computers between the ages of 5 and 8

From a party ,lori made a fruit punch from 1 gallon of orange juice ,2 quarts of grape juice,5 pints of pineapple juice,and 12 cups of cranbarry juice order the juice from least to greatest amount used in the fruit punch