HI im really stuck with this question, i dont know what to do with it??..can anyone help??..id like to learn how to solve this question...thanks. A man makes two cups of instant coffee four times a day. On every occasion he fills the kettle up to the 10-cup level. What is the cost of the energy he wastes in one year by heating more water than is neccessary??..make suitable assumptions to solve. Pleeeeeeeeeez help me!!