Problem $14\mathrm{.}019-$Collislon of three cars

Cruiser $\backslash ($A $\backslash )$was traveling east at $\backslash ($X$=87\backslash$mathrm$\{$mi$\}/\backslash$mathrm$\{$h$\}\backslash )$on a police emergency call when it was hit at an intersection by car $\backslash ($B $\backslash ),$which was traveling south at high speed. After sliding together on the wet pavement, the two cars hit cruiser $\backslash ($C $\backslash ),$which was traveling north at $\backslash (45\backslash$mathrm$\{$mi$\}/\backslash$mathrm$\{$h$\}\backslash )$and was $63$ft from the intersection at the time of the first collision. Stuck together, the three cars hit a wall and came to a stop at $\backslash ($D $\backslash ).$Knowing that car $\backslash ($B $\backslash )$weighs $3600$lb and that each of the cruisers weighs $3000$lb $,$solve the oroblems bv nealectina the forces exerted on the cars bv the wet oavement and treating the cars as point masses.