Help please! this ones easy i just dont know how to do it

Which of the following are accepted without proof in a logical system? check all that apply.

Expresa commuter train leaves downtown sation and travels at a average speed of 55 miles per hour towards the north side sation, which is 50miles away. thirty minutes later, express commuter train #7 leaves north side and travels at a average speed of 35miles per hour towards downtown sation. at the moment the two trains pass each other, how far(in miles) is train #12 from the downtown sation and how long(in minutes) has the #12 train been traveling

Is the power produced directly proportional to the wind speed, give reasons for your answer?