$2\mathrm{.}56.$ Consider Example $2\mathrm{.}4\mathrm{.}2$ for Car $1$ illustrated in Figure P$2\mathrm{.}56$ if three passengers totaling $200$ kg are riding in the car. Calculate the effect of the mass of the passengers on the deflection at $20,80,100,$ and $150k\frac{m}{h}.$ What is the effect of the added passenger mass on Car $2?$

Figure P$2\mathrm{.}56$ A model of a car suspension with the mass of the occupants, $m_p,$ included.