$($b$)$ A shaft with two supports is loaded in

such a way that the axial thrust on

each bearing is $500$ N and the radial

thrust is $2000$ N and $1000$ N

respectively at left$-$ and right$-$hand bearing. The shaft rotates at $1440$ rpm $.$ The

bearing is to be selected based on $3$ hours per day for $10$ years. The shaft diameter

is $40$ mm but may be reduced if the situation permits considering low moment.

Select the suitable bearings. $[5$ Marks$].$