please answer these True/false questions.

TRUE/FALSE. Write T if the statement is true and F if the statement is false. 7) One cost that is irrelevant in decision making is a sunk cost. 8) In most circumstances, all fixed costs can be eliminated by outsourcing a product. 9) One key to analyzing short-term business decisions is to focus on relevant revenues, costs and profits. 10) Opportunity costs should be factored into outsourcing decisions. 11) From a purely financial standpoint, if a product line has a negative contribution margin, the product line should be discontinued