The graph shown gives the weight of a certain person as a function of age.Find the age at which the person started an exercise program. 
Definitions:
Phasic Receptors
Sensory receptors that quickly respond to stimuli but then adapt and decrease their response over time.
Proprioceptors
Sensory receptors located in muscles, tendons, and joint capsules that provide information about body position and movement.
Moving Hand
The complex motor function involving the muscles, bones, and nerves of the hand, enabling manipulation and movement.
Proprioception
The sense of the relative position of body parts and strength of effort being employed in movement.
Q4: Set up and evaluate the integral that
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