Please help with these questions!!

Variable cost per unit, within the relevant range, will. increase as production decreases decrease as production decreases remain the same as production levels change decrease as production increases Which of the following statements is true of the behavior of total fixed costs, within the relevant range? They will remain the same as production levels change. They will increase as production decreases They will decrease as production decreases. They will decrease as production increases. Assume that Anna's cellphone service provider charges $6 per month and $0.4 per minute per call. If Anna's current bill is $80, how many calling minutes did Anna use? 220 minutes 200 minutes 185 minutes 170 minutes