A six-foot tall man is standing x feet away from a 14-foot tall streetlamp. S is defined as the length of the man's shadow. a. Write an equation that describes the length of s in terms of x. b. The man is initially 4 feet from the base of the lamppost. If he is walking away at a rate of 3 feet per second, write an equation to describe his position x, at time t in seconds. c. What is the length of the man's shadow after 3 seconds.