Please choose the correct ending to complete the given sentence: Sports and Fitness: [header] How to serve a ping pong ball with a topspin [title] Serve a ball with no spin. [step] This ball will not travel as fast, but if you are just learning how to play ping pong, it is important you can do this first. [substeps] Hit the ball near its equator, which is the line just through the exact center of the ball.

Ending1: Make sure you hit it with your racket at a 90 degree angle to the ball. The ball will travel forwards and have little to no spin. Ending2: This is where the ball falls on impact. [title] Use the handgrip to grasp the ball. Ending3: Use a topspin ball twice per set. [title] Have your opponent hit the ball first. Ending4: This will give you a straight shot to the club. Make sure the ball is still low-speed when you hit it, and hit it a few times faster as it can travel in the direction you want it to travel.

Answer format: ending1/ending2/ending3/ending4