#smq - why "births = Population[middle] * birth rate" subcript range is five `infant, child, teen, middle, old` where the first four is subranged with `previous cohort` to use for initial value for INTEG and the last four is subranged with `all but youngest` to use for 0..50 subrange: - infant: 0 - all but youngest: 1..50 need two subscript subrange for aging model: `all but youngest`: 0..N-1 and `pervious cohort`: 1..N subscript subrange [infant] = INTEG(): birth - aging[infant] initial value: initial population[infant] subscript subrange [all but youngest] = INTEG(): aging[previous cohort] - aging[all but youngest] initial value: initial population[all but youngest] initial population is subscripted with age, and has value 30, 50, 50, 60, 50. average time in cohort is 2, 10, 7, 40, 20 ![[Pasted image 20230114150112.png]]