If a point randomly located in an interval (a,b) and if y denotes the location of the point, then y is assumed to have a uniform distribution over (a,b). A plant efficiency expert randomly selects a location along 500-ft assembly line from which to observe the work habits of the workers on the line. What is the probability that the point she selects is
a). within 25 feet of the end of the line?
b.) within 25 feet of the beginning line?
c.) closer to the beginning of the line than to the end of the line?