F the reaction n2o4g lt--gt equilibrium arrows 2no2g kp

Question

For the reaction N2O4(g) <--> (equilibrium arrows) 2NO2(g), kp = 0.25 at a certain temperature. Calculate the equilibrium pressures of NO2(g) and N2SO4(g) if the initial pressures of the components when placed in an otherwise empty container are as follows initial PNO2 = 0.0 atm Initial PN2O4= 0.040 atm Equilibrium PNO2 = ? atm Equilibrium PN2O4 = ? atm How do I go about solving this?