Use the given recursion and starting value of
to find
:

Do the same for
and
:


(That's not a mistake. This just tells you that the 2nd and 3rd iterates are very close together and have at least the same first 5 digits after the decimal.)
Yes.
-- Take 10/50.
-- Divide numerator and denominator by 2.5 ,
(Or multiply them by 0.4 .)
-- You now have 4/20 .
Here:
PFA for the answers. The numbering might confuse you. It goes from the 1 to the last marked question in ascending order. Hope it helps you. ~BYE
16z because you’re adding 4z four times