Experience Has Shown That While Walking In A Certain Park The Time X In Mins Between Seeing Two People Smoking Has A Density Function Of The Form Fx Axe X X0 0 Otherwise Find I Value Of A Ii Cumulative Distribution Function Of X Iii What Is The Probability That Jeff Who Has Just Seen A Person Smoking Will See Another Person Smoking In 2 To 5 Mins In At Least 7 Mins