I need help with some grade 12 Physics questions

I really need help with these grade 12 Physics questions, I have an exam tomorrow and I don't understand a lot of the material. if you could please answer one, or as many questions on here as you can, I would really appreciate it!

Here are the questions:

Hooke's law states that F = -kx. By describing the direction of F when x is zero (at rest
position), negative (to the "left" of rest position), and positive (to the "right" of rest
position), explain why F is an example of a restorative force.

Shahan decides to take a break after studying for so long. He goes to the park (in his
winter jacket and snow pants) and slides down a slide. If he reaches a maximum speed of
7.2 m/s at the bottom of the slide, how tall is the slide?

Aakash discovers that he has electrostatic powers and decides to use his powers to
fight crime, as Electroman. One day, he captures villains who attempt to rob a bank by
repelling 7.45 g bullets by charging himself to 6.8 C. The bullets, which are fired 76 m
from Aakashe’s position, experience an acceleration of 405 m/s2 away from Aakash.
What is the charge on the bullet?

An electron travels with a velocity of 5.4 * 104 m/s [N 43º E] into a magnetic field of
0.78 T [S 38º E]. What is the magnitude and direction of the magnetic force acting on the
electron?

15. Pelumi conjures up a plan to get more study time before exams come. He hops on a
spaceship and zooms around at a speed of 0.6c until his first exam day. Is this a good
idea? Explain.

if you know how to answer one or some of the questions, please explain how I can get to the answer instead of just giving me the answer, thank you very much! :)

In your first question the spring is opposing the direction of movement. If you move it in the negative direction the force is positive and accelerates to spring back towards zero.
Hence it is attempting at all times to prevent movement away from zero.