With what force must the pump piston be pulled upward in order to raise mercury to a height of h $=50$ cm$?$ The cross$-$sectional area of the pump tube is $4$ cm$?,$ the atmospheric pressure is $105$ Pa$,$ the density of mercury is p $=13\mathrm{.}6$ g$/$cm$\text{'},$ and the free fall acceleration is $10$ m$/$ s$2.$

a$)27$N

B$)27$mN

C$)13$n

D$)13$KN