When $80-60-40$ and $20$ newtons loads are hung on the lower load hanger in the fully lubricated friction experiment with a shaft speed of $600$ rpm$,$ the total load acting is $375-295-215$ and $135$ newtons, respectively. The perpendicular distance of the torque arm hanger to the point where the moment will be taken is $300$mm and the shaft radius is $20$mm$.$ Fill in the table below using this information.