Answer:
ax = 1.23 m/s²
ay = -6.32 m/s²
Step-by-step explanation:
The acceleration is equal to the change in velocity over time. So, the acceleration of in the x-component is equal to

Where vfx is the final velocity on the x-direction which is equal to 0 m/s because at the end the velocity is in the y-axis. vix is the initial velocity which is -2.70 m/s and t is the time, so t = 2.20s.
Replacing the values, we get:

In the same way, we can calculate the y-component of the acceleration as

Replacing vfy = -13.9 m/s and viy = 0 m/s, we get:

Therefore, the answer is
ax = 1.23 m/s²
ay = -6.32 m/s²