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A mass weighing 4 pounds is attached to a spring whose constant 2 lt/ft. The medium offers a damping force that is numerically equal to the instantaneous velocity. The mass is Initially released from a point 1 foot above the equilibrium position with a downward velocity of 12 ft/s. Determine the time in s) at which the mass passes through the equilibrium position (Use 9 - 32 ft/s for the acceleration due to gravity) Find the time (ins) after the mass passes through the equilibrium position at which the mass attains its extreme displacement from the equilibrium position Wihat is the position (int) of the mass at this instant? it