Don't they have to pay insurance company if something happens to there car.
Answer:

Explanation:
As we know that loop is placed in YZ plane and magnetic field is along x direction
So here net force on the side of the loop which lies along Y axis is given as

here we know that on Y axis z = 0
so B = 0
so we have

now on the opposite side we have z = a
so magnetic field is given as

so force on that side is given as



so net force on the loop is given as


The car's average acceleration would be 1.25m/s^2 or 1.25meters/second/second. That looks to be the fourth one you've listed.
the mass number minus the atomic number