A $2010-$lbf rear$-$wheel drive tractor carrying $900$ lbf of gravel starts from rest and accelerates forward at $1\mathrm{.}93$ ft$/$s$2.$ Please note that for rear$-$wheel drive vehicles, static friction is applied only to the rear wheels.

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$1.$ Determine the reaction at each of the two rear wheels A$.$ FA $=$ i $+$ j $($lbf$)$

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$2.$ Determine the reaction at each of the two front wheels B$.$ FB $=$ i $+$ j $($lbf$)$