a) d m s prop m/s seconds.
b) d L R trans L/R seconds.
c) d (m/ s L/ R) end to end (m/s+L/R) seconds.
d) The bit is just leaving Host A.
e) The first bit is in the link and has not reached Host B.
f) The first bit has reached Host B.
g) Want
m=L*s/R
=536km