Physics Question from JEE Main 2023 · 29 January, Shift 1

A tennis ball is dropped onto the floor from a height of $9.8 \, \text{m}$. It rebounds to a height of $5.0 \, \text{m}$. The ball comes in contact with the floor for $0.2 \, \text{s}$. The average acceleration during contact is _____ $\text{m/s}^2$. (Given $g = 10 \, \text{m/s}^2$)