I need help with this, please!

In a General Physics Laboratory at Portland State University, a small piece of putty of mass m1 is fired with velocity vy; at a stationary wooden block of mass my resting on a horizontal table. After a head-on collision, the putty sticks to the wooden block and the two slide along the surface of the table together as a single mass. (A) What equations from conservation are useful for determining vif and v2f. Simplify equations and solve for vy in terms of vi; and the two masses m, and m2 . (B) After the collision the two masses slide along the table a distance x before being slowed by friction and coming to a stop. The coefficient of kinetic friction /4 . Solve for the stopping distance x in terms of the masses my and my, the initial fired velocity of the putty v1; , gravity g , and the coefficient of kinetic friction /k. (C) Before the experiment the mass of the putty is determined to be 105 grams, the mass of the block is 10.5 kg and the putty is fired with an initial speed of 25 m/s. The coefficient of friction between the block and the table is determined to be 0.15 . Determine the expected stopping distance x