Which direction will the reaction between Hydrogen and Nitrogen forming

Ammonia $($at equilibrium with DH$\backslash$deg $=-91\mathrm{.}8$ kJ$/$mol$)$ shift when each item

listed below happens? $($one point each$)$

a$.$ Nitrogen is removed $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

b$.$ Hydrogen is added $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$

c$.$ Overall pressure is increased$\_\_\_\_\_\_\_\_\_\_\_\_$

d$.$ An increase in temperature $\_\_\_\_\_\_\_\_\_\_\_\_\_$

e$.$ Addition of a catalyst $\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_\_$