Suppose the equilibrium constant of the dissociation reaction H2 = 2H at 2000 K and 1 atm

Question:

Suppose the equilibrium constant of the dissociation reaction H2 = 2H at 2000 K and 1 atm is K1. Express the equilibrium constants of the following reactions at 2000 K in terms of K1:
(a) H2 ↔ 2H at 4 atm,
(b) 2H ↔ H2 at 1 atm,
(c) 2H2 ↔ 4H at 1 atm,
(d) H2 + 2N2 ↔ 2H + 2N2 at 2 atm and
(e) 6H ↔ 3H2 at 4 atm.