A body in motion has uniform acceleration as it moves in a straight line between points $X$, $Y$ and $Z$. The distances $XY$ and $YZ$ are each $40\,\text{m}$. It takes $12\,\text{s}$ to go from $X$ to $Y$ and $6.0\,\text{s}$ to go from $Y$ to $Z$. What is the acceleration of the body?
- A$0.37\,\text{m s}^{-2}$
- B$0.49\,\text{m s}^{-2}$
- C$0.56\,\text{m s}^{-2}$
- D$1.1\,\text{m s}^{-2}$