Swiss tender is already an answer so. but no : This kind of tender are biaised, because politic top brass always had the last word. We, french, were very surprised to have plenty rumors from switzerland until 15 days before the official answer that Rafale was choosen and after the Joe Biden visit it changed 180° ....a) The Finnish competition should settle that as long as both jets get shortlisted.
b) Nah. The air force don't need it.
c) The Russians follow the evolutionary approach while the Americans have designed the F-35 using the big bang approach. A lot of stuff that's taking time on the F-35 was slowly developed by the Russians and introduced over many years on the Su-30, Su-34 and Su-35 before starting work on the Su-57. The Su-57 is also WIP and has taken 15 years to date, with an expected completion date of 20 years. So the Russians will have taken roughly the same amount of time even with their evolutionary approach. Plus the Americans screwed up quite a bit. The Russians haven't screwed up as much. At the very least they are waiting for the completion of the jet's development before placing large orders.
I have no hope for Finland deal. The game is over : Finland will purchase a piece of the american umbrella, even if it was a Grumman F6 Hellcat.