Physical Chemistry - Chemical Equilibrium2 ?

For the following reaction : N2O4(g) >< in equilibrium 2NO2(g)
The next parameters for this question are also given In the web site:

https://picasaweb.google.com/asaf2608/Desktop03?authkey=Gv1sRgCLOS7t7CjcneRw#5611415759272179986

Answerer the following in 3 possible answers’: will not change, will arise, will descent.(the answer is need to be in the ___ lines, and please explain shortly)
1) Given a mixture of gases that the partials pressures are:
P(N2O4)=720 torr , P(NO2)=100 torr
In this situation the system is not in equilibrium , the amount of NO2(g) will ______ in the way to equilibrium ?
2) After the mix in the question 1) got to equilibrium, someone put 5 mol of Aragon to the vessel, whereas the volume of the mixture is staying constant, in this situation the amount of NO2(g) ______ ?
3) After the mix in the question 1) got to equilibrium, someone put the vassal of the mixture in a ice bath, in this case the amount of NO2(g) will ____?
Given: when the mix in question 1) is in equilibrium the amount of moles of the compundes are ,
n, (N02(g))=0.372 [moll] , n,(N2O4(g))=0.814[moll]