Hydrogen is produced by the reaction between steam and methane when the following dynamic equilibrium is established.

CH₄(g) + H₂O(g) <---> CO(g) + 3H₂(g) ΔH = +206 kJ mol⁻¹

Use Le Chatelier's principle to predict the separate effects of an increase in temperature and of an increase in pressure on the yield of hydrogen obtained in the above reaction. In each case, explain your answer.