Friction in sliding?

Question

Could someone please explain how to solve the following problem? Thanks.

A baseball player running at 9.5 m/sec between bases decides to slide the remaining 3.2 meters into home plate. If the mass of the baseball player is 75 kg, calculate

(a) the force of friction
(b) the coefficient of friction

Answer 1

All kinetic energy Ke gets converted to work done by friction Wf to stop the player.
Ke=Wf
(1/2)mV^2= fs
a) f=mV^2/(2 S)
f= 75 (9.5)^2/(2 x 3.2)=
f= 1058N

b) f=uN
u= f/mg= 1058/( 75 x 9.81)= 1.44