School help?

[Axe Man]

Alright so I'm a little behind and have more courses on my plate then I wish to even attempt to list. These are some really simple problems, just asking for some help cause I'm overloaded with work. Please no comments that do not help. Any comments like those will be deleted.
1. 1.10X104 J of work was done on a object weighing 3680N. How much gravitational potential energy did the object have at the maximum height of the lift? Show your work

2. A backpacked weighed 8.1N Suppose the pack was lifted to a height of 42cm. How much gravitational potential energy does the pack gain. Show your work.

3. A box having the mass of 5.00 kg is lifted 75.0 cm from the ground to the top of a desk. What is the gravitational potential energy of the box on the desktop? Show your work.

4. A object with the mass of 85.0kg and has a gravitational potential energy of 2.50X103 J is on a board. Determine how high the object is from ground level. Show your work.

5. A object with the mass of 1990 kg is travelling at a speed of 28.0 m/s. Determine the kinetic energy of the object. Show your work.

6. A object is thrown with a mass of 145 g. It approaches with 122 J of kinetic energy. Calculate the speed of the object. Show your work.