Consider a $76\mathrm{.}0-$kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of $1\mathrm{.}42$ m$/$s in $0\mathrm{.}900$ s$.$ It travels with this constant speed for the next $5\mathrm{.}00$ s$.$ The elevator then undergoes a uniform acceleration in the negative y direction for $1\mathrm{.}30$ s and comes to rest.$($a$)$ What does the spring scale register before the elevator starts to move? N$($b$)$ What does the spring scale register during the first $0\mathrm{.}900$ s$?$ N$($c$)$ What does the spring scale register while the elevator is traveling at constant speed? N$($d$)$ What does the spring scale register during the time it is slowing down? N