lfsit} represents the rate at 1which students are entering a school building thours afterthe doors open at T30 am, 1 l f 5mm represents 0.5 then 1o.5 C) the total number of students in the building at 8:30 am. 0 the rate at which students are entering the building at 3:30 am. 0 the average number of students in the building between 8:00 and 0:30 am. 0 the average rate at WhiCh students are entering the building between 8:00 and 3:30 am