A bicycle and rider, with a combined mass of 90 kg, are decelerating a

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A bicycle and rider, with a combined mass of 90 kg, are decelerating at 3 m/s2 on a horizontal surface. The rear contact point is 0.4 m behind the center of gravity. The front contact point is 0.6 m in front of the center of gravity. And, the center of gravity is 1.2 m above the ground. What are the normal forces NF and NR that the ground is putting on the wheels of the bicycle?

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A bicycle and rider, with a combined mass of $90 k g$ , are decelerating at $3 m / s^{2}$ on a horizontal surface. The rear contact point is $0.4 m$ behind the center of gravity. The front contact point is $0.6 m$ in front of the center of gravity. And, the center of gravity is $1.2 m$ above the ground. What are the normal forces $N_{F}$ and $N_{R}$ that the ground is putting on the wheels of the bicycle?