{Estion B3 (a) An online shop has 19 types of canned food and 21 types of 'ozen food to be launched next week. The online shop plans to select some types of food for discount. (i) Find the number of ways to select 2 types of canned food and 2 types of frozen food to put on discount. The discounts oflhe 4 types of food are the same. (2 marks) (ii) Find the number of ways to select 3 types of canned food and 1 type of frozen food ID put on discount, such that 2 of the selected types will be on 75% discount and 2 of the selected types will be on 50% discount. (4 marks}