A single train wheel exerts a load of 135 kN on a rail assumed to be supported by an elastic foundation. For a modulus of foundation $k = 16.8 \text{ MPa}$, determine the maximum deflection and maximum bending stress in the rail. The cross section of the wheel is a rectangle with dimensions $b \times h$.
$v_{max} = 3.375 \text{ mm}$, $\sigma_{max} = 2.82 \text{ MPa}$