An 8 pound weight is attached to the end of a spring hanging from the ceiling. Once the spring comes to rest, it is pulled down another D feet and released with an initial downward velocity of 3 feet per second. Assume the drag force is negligible. Suppose the lowest point the spring reaches is 5 feet below the point it was resting (before it was pulled down D feet) and suppose /2 seconds elapse between any two successive times when the weight is at its maxmimum height. What are the values of D and the spring constant k?