The graph shows Harry's PPF. Grade in economics (percent) 90- What is Harry's marginal cost of tennis if he plays for 5 hours a week? What is Harry's marginal cost of tennis if he plays for 7 hours a week? > >>Answer to 1 decimal place. 80 78-....... C 75-................ Harry's marginal cost of tennis when he plays for 5 hours a week is | | percentage points in economics. Harry's marginal cost of tennis when he plays for 7 hours a week is | percentage points in economics. Harry's PPF 40+ O 8 10 12 Tennis (hours per week)