The radius of a huge wooden turntable in the form of a flat disk is 2.00 m, and the total mass is 120 kg. Initially, the turntable rotates at 5.0 rad/s around a vertical axis through its center. Suddenly, a parachutist lands softly on the turntable, 1.0 m from the center of the disk. After landing, the parachutist and turntable spin at 4.0 rad/s simultaneously. What is the parachutist's mass?

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