design a single dry plate clutch to transmit 10 kw at 1200 rpm . assume the following both sides of plate effective R/b=6; number of spring=12, C= D/d =8, r=600Mpa, intensity of pressure= 0.07N/mm^2, u= 0.35, overload design for the spring= 30%, 4 active turn, spring is square and ground end type.