I need help with question 3 and did I get questions 4 and 5 right?

Lesson 1 You should use the tools in Lesson 1 to help you answer questions 1-3. 3. If you want the same acceleration, how much force you have to exert on 3 times large mass (give numerical value). 4. If two objects of different mass are dropped from the same height at the same time, ignoring air resistance, which will hit the ground first, more or less massive object? Explain your answer. They will hit the ground at the same time because the acceleration due to gravity is the same for all objects. 5. If you didn't ignore air resistance in question 4, which one hit ground first, large mass or smaller mass one? Large Mass