Please solve

Determine whether the following sampling methods are independent or dependent and which calculator function you would use for a hypothesis test. (a) A farmer investigates whether talking to cows by name leads to producing more milk. He randomly selects 30 of his cows and randomly chooses 15 to talk to by name and the other not to. This situation is [ Select ] and we would use the [ Select ] calculator function. (b) Does the path a baseball player takes "rounding" first base to second base make a difference? 22 players were timed taking both a narrow angle then wide angle path while running from first to second base with a small rest period in between. This situation is [ Select ] and we would use the [ Select ] calculator function. (c) A public speaker wants to see if she can change her audience's mind about a certain topic. As people enter the auditorium her assistant randomly selects 50 people and polls them on whether they support or are against the topic. Then at the end of the event the assistant randomly selects 50 people again, asking about their opinion. This situation is [ Select ] and we would use the [ Select ] calculator function