A Gallup Daily Tracking Survey found that the mean daily discretionary spending by Americans earning over $90,000 per year was $136 per day. The discretionary spending excluded home purchases, vehicle purchases, and regular monthly bills. Let x= the discretionary spending per day and assume that a uniform probability density function applies with f(x)=0.00625 for a≤x≤b. What is the probability that consumers in this group have a daily discretionary spending of $80 or less?