40. Solving a chemistry problem

7. In each task, the equilibrium system refers to paragraphs. "a" and "b".
For item "a" write an expression for the equilibrium constant and determine in which direction the equilibrium will shift with an increase in pressure and temperature in a given system. Justify the answer. What other influences on the system can shift the equilibrium to the right?
For item "b" the task is different in each case.

a) C2H2 (g) H2 (g) = C2H4 (g).
b) Find the equilibrium concentration of C2H4 if the equilibrium constant is 10, and the initial concentrations of C2H2, H2, C2H4 are 3 mol/l, 2 mol/l, 0 mol/l, respectively.