```
Braking time = (Final velocity - Initial velocity) / Deceleration
```
Let's assume the initial velocity is 1.5 seconds and the final velocity is 2 seconds. We don't have information about the deceleration, so let's say the deceleration is 1 m/s².
Plugging these values into the formula, we get:
```
Braking time = (2 seconds - 1.5 seconds) / 1 m/s²
```
```
Braking time = 0.5 seconds
```
Therefore, the braking time from 1.5 to 2 seconds is 0.5 seconds.
As for the final velocity, it is given as 2 seconds in the problem statement. So the final velocity is 2 seconds.
