I only have 14 more minutes
Which of these are included in the immune response? Select 3 correct answers.
T-cells
lymphocytes
B-cells
stem cells
oil

Can someone explain to me how to do this problem ?

While goofing off at the ice skating rink, a student takes off her shoes and places each of them on the ice. her friend, a hockey player, then shoots a hockey puck at each shoe. the first puck immediately comes to rest after it collides with the left shoe. the second puck rebounds after it collides with the right shoe. if each hockey puck has the same incoming speed, which shoe has greater speed after the collision? the right shoe. both shoes have the same speed. the left shoe.

Could someone me find the answer to this problem.