Suppose the University of Oklahoma decides to alter its tuition schedule by separating its students based on how many credit hours they have accumulated. Students with fewer than 15 credit hours get a 13% reduction in tuition while students with 45-90 and more than 90 credit hours face an increase in tuition of 22 and 71%, respectively. Fully explain whether this pricing strategy is rooted in a sound understanding of the price elasticity of demand, or not.