25,31c25,43
< A1 = activity(...), 
< A2 = activity(...), 
< A3 = activity(...), 
< A4 = activity(...), 
< A5 = activity(...), 
< A6 = activity(...), 
< A7 = activity(...).
---
> A1 = activity(duration => 10,earlyStart => 0,lateStart => 10,requests => []), 
> A2 = activity(duration => 20,earlyStart => 0,lateStart => 0,requests => []), 
> A3 = activity(duration => 30,earlyStart => 0,lateStart => 0,requests => []), 
> A4 = activity(duration => 18,
>               earlyStart => 20,
>               lateStart => 20,
>               requests => [A1,A2]), 
> A5 = activity(duration => 8,
>               earlyStart => 30,
>               lateStart => 33,
>               requests => [A2,A3]), 
> A6 = activity(duration => 3,
>               earlyStart => 38,
>               lateStart => 38,
>               requests => [A1,A4]), 
> A7 = activity(duration => 4,
>               earlyStart => 41,
>               lateStart => 1e+50,
>               requests => [A5,A6]).
