A mass m $=2$ kg hangs from a spring that is attached by the other end to the ceiling. A

student then grabs the mass and pulls down with a force of $5\mathrm{.}4$ N$.$ The spring has a spring

constant k $=10$ N$/$m$.$ By what distance does the spring stretch?

Assume that g $=9\mathrm{.}8$ M$/$s$^2$