could you please also help and explain problems 4 and 5? im confused on it and need clarifications

4) An equilibrium mixture of NO2 and N2O4 follows the equilibrium equation The equilibrium expression for this reaction is K=[NO2]2[N2O3] and at 200CK=9.62102. Suppose an equilibrium mixture at 200C contains 0.0144mol of inert argon and 0.0525 mol of N2O4 in a 12.0L container. Determine the molar concentration of NO2 in the mixture. [1.92102mol/L] 5) Compounds A, B, and C react according to the following equation. At 100C a mixture of these gases at equilibrium showed that [A]=0.855M,[B]=1.23M, and [C]=1.75M. What is the value of K for this reaction at this temperature? KC=(G)2A)=2(32) [3.24] (0.08206