Propositions (4), (5), and (6) occupy something like the interval from 0.01% to 1% (I find it hard to discriminate in this range, and in particular to judge these three against each other).
I’d guess you could estimate (4) to within an order of magnitude or better from an actuarial table.
I’d guess you could estimate (4) to within an order of magnitude or better from an actuarial table.