My question was confusing since it ultimately asked about statistical significance, and meant to ask concerning the chances that at the interim, Vital 1 would be below a p value of 0.01.
That was the question I guestimated. (Although note that I left unstated a bunch of assumptions about enrollment curves, km curve shape, ... . But, heck, it was only a guestimate.)
From your answer, I am assuming that depending on curve shapes, etc, that percent power represents the chances or probability of both the treatment effect happening and being detected. Is that accurate?
No. See first answer above.
Will answer your second question later.