Solve the all parts of following problem given below:

Problem: Julie is trying to move a 20 kg box across the floor to the right. She first attaches a rope to the box and pulls horizontally. She finds (using a force sensor) that when she exerts a force of 89.0 N on the ideal rope, the box just begins to move.

Part A: Draw a force diagram of the box when it is not moving?

Part B: What is the coefficient of static friction between the box and floor?

Part C: She now replaces the rope with a spring. When the spring is stretched 12 cm (horizontally), the box begins to move. What is the spring constant of the spring?

Part D: When she moves the box with constant velocity by pulling on the spring, the spring is only stretched 10 cm. Draw a force diagram of the box in this case.

Part E: What is the coefficient of kinetic friction between the box and the floor?

I need help to determine the coefficient of static friction between the box and floor.