67. VITAMINS Diego mixes together three types of vitamin tablets. Each Super Vim tablet contains, among other things, 15 mg of niacin and 12 I.U. of vitamin E. The figures for a Multitab tablet are 20 mg and 15 I.U., and for a Mighty Mix are 25 mg and 35 I.U. How many of each tablet are there if the total number of tablets, total amount of niacin, and total amount of vitamin E are as follows? a. 225 tablets, 4750 mg of niacin, and 5225 I.U. of vitamin E b. 185 tablets, 3625 mg of niacin, and 3750 I.U. of vitamin E c. 230 tablets, 4450 mg of niacin, and 4210 I.U. of vitamin E