Which pair of angles is a pair of alternate interior angles?

Can someone check if i did this correct. it’s number 4 if you’re wondering.

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

Look at triangle wxy what is the length (in centimeters) of the side wy of the triangle?