Please help

7) (30 points total) A 5.00 x 10-3 kg wad of sticky chewing gum is fired horizontally at a 0.850 kg wooden block resting on a horizontal surface. The chewing gum remains stuck to the surface of the block, and the combination is observed to slide 0.230 m along the horizontal surface before stopping. The coefficient of kinetic friction between the block and the horizontal surface is 0.20. 7a) (10 points) Draw a complete free-body diagram of the sliding block-gum combination. Label the types of forces acting on the block-gum combination and their directions. Please DO calculate the magnitudes for all of your forces and be sure to show ALL OF YOUR WORK. 7b) (5 points) Of the forces you labeled on your free-body diagram, which ones do positive work, negative work, and no work on the block-gum combination while it's sliding? Fully explain the reasoning behind your choices. 7c) (7.5 points) Use the work-energy theorem to calculate the velocity of the block-gum combination at moment right when it starts to slide on the horizontal surface. 7d) (7.5 points) Use the conservation of linear momentum to determine the initial speed of the gum. 7b) (5 points) Of the forces you labeled on your free-body diagram, which ones do positive work, negative work, and no work on the block-gum combination while it's sliding? Fully explain the reasoning behind your choices