Explain step by step

1) How much force was
used in order to push an object 4 meters if the work done is 22Nm

2) A person uses a force of 7N is used to pull a box for 8 seconds with a speed of 1.5 m/a. Calculate the magnitude of work done by the person

3) A 2kg object is pushed from a speed of 3m/a to 7/ms. How much work was done on the object?