What is the acceleration of an athlete who speeds up from 2 m/s to 9 m/s in 5 seconds

Iwill give brainliest if you answer right : )

This chart shows characteristics of three different types of waves. which statement is best supported by the information in the chart? wave x and wave y are mechanical waves, and wave z is an electromagnetic wave. wave x and wave y are electromagnetic waves, and wave z is a mechanical wave. wave x and wave z are electromagnetic waves, and wave y is a mechanical wave. wave x and wave z are mechanical waves, and wave y is an electromagnetic wave.

Which of the following statements accurately describes the sign of the work done on the box by the force of the push? a. positive b. negative c. zero