Answer:
a. Picture attached
b. V, X
c. 
d. It makes sense cosidering that a normal heart beat rate is between 60 and 100 beats per minute (bpm).
Explanation:
First we have to identify the unknown of this problem:

Considering the characteristics of the problem and that distance and velocity are specified, the acceleration is constant, for that reason we use the equations of uniformly accelerated motion as follows:

If we reorganize the equations, considering that
and
are zero because motion starts from rest , we have:

Finally, the analysis of the result leaves us to understand why the normal heart beat rate varies between 60 and 100 bpm.
If that happens to your car and you double the speed then it will take the car longer to come to a complete stop
Answer:you can just look this up yknow?
Explanation:
I think there would be an increase in force of friction
The colour of the star and the brightness.