12. Three Tasks, A, B and C with task A being the highest priority and task C being the lowest, require to set up 3 differential timers as follows: At t = 15s task A sets up a timer to expire in 15s and execute function f(a). At t = 20s task C sets up a timer to expire in 9s and execute function f(c). At t = 25s task B sets up a timer to expire in 6s and execute function f(b). Select ALL answers that are correct: A) At t= 26 secs the timer objects in the list are from tasks B, A and C (in the order stated, where B is at the head of the queue, A is in the middle and C is the end of the queue) and their time remaining values for these timers are 3 secs for task C timer, 1 sec for task A timer and 1 sec for task B timer. B) At t= 16 secs the timer object in the list is from task A and its time remaining value is 14 secs. C) At t= 21 secs the timer objects in the list are from tasks C and A (in the order stated, where C is at the head of the queue and A is the end of the queue) and their time remaining values for these timers are 8 secs and 9 secs respectively. D) At t= 21 secs the timer objects in the list are from tasks C and A (in the order stated, where C is at the head of the queue and A is the end of the queue) and their time remaining values for these timers are 8 secs and 1 sec respectively. E) At t= 21 secs the timer objects in the list are from tasks C and A (in the order stated, where C is at the head of the queue and A is the end of the queue) and their time remaining values for these timers are 7 secs and 2 secs respectively. F) At t= 26 secs the timer objects in the list are from tasks C, A and B (in the order stated, so C is at the head of the queue, A is in the middle and B is the end of the queue) and their time remaining values for these timers are 2 secs for each timer.