25 PTS AND BRAINLIEST ANSWER PLEASE HELP ME BEFORE 9 PM

A truck accelerates at a rate of 1 m/s2 for 10 seconds. At that time the truck continues traveling at a constant velocity for the next 20 seconds. The truck then begins to slow down at a rate of -1 m/s2 until it comes to rest.

1.What was the truck’s speed at 10 seconds?

2. How far did the truck travel during the first ten seconds?

3. How far did the truck travel for the whole 30 seconds?