plz answer 23 and 24

Question 23 Which of the following statements about CVP analysis is false? Not yet answered Marked out of 0.60 a. Operating income calculations in CVP analysis are based on contribution margin not gross margin. b. All of the given answers are true. c. Unit selling price, unit variable costs, and total fixed costs are known and remain constant. d. Total revenues and total costs are linear in relation to output units. The CVP analysis assumes that total variable costs remain the same over a relevant range. e. question Question 24 Not yet answered Marked out of 0.60 P Flag question Holding other factors constant, a company's contribution margin per unit will increase with: a. All answers given are NOT correct. b. any increase in variable cost per unit cany increase in the selling price per unit d. increase in its total fixed costs O e any increase in quantity sold