The driveway will support vehicles with a maximum axle load of $10$ kN and will have dimensions of $6$ meters in length, $3$ meters in width, and a thickness of $0\mathrm{.}15$ meters. The concrete to be used has a characteristic compressive strength of $25$ MPa. Calculate:

a$)$ The total load the driveway will bear.

b$)$ The maximum bending moment experienced by the slab.