What conclusion can be draw about the heat of fusion of water from the heating curve?

Agas contained within a piston-cylinder assembly undergoes three processes in series: process 12: compression with pv= constant from 1 bar and 1 liter to 4 bar. process 23: constant pressure expansion to 1 liter. process 31: constant volume calculate the pressure and volume at each state, and sketch the processes on a p-vdiagram labeled with pressure and volume values at each numbered stat

See the attachment and solve question 5th

Anika asks eva to roll a basketball and then a bowling ball to her. which requires more force to roll, and why?