use Student's t distribution to solve

Example: . Ten young soldiers were put through a physical training program by the Army. Their weights were recorded before and after the training with the following results: Soldiers 1 2 3 4 5 6 7 8 9 10 Weight 125 195 160 171 140 201 170 176 195 139 Before Weight 136 201 158 184 145 195 175 190 190 145 After of soldiers? . Using a =0.05, would you say that the program affects the average weight . Assume the distribution of weights before and after to be approximately normal