Assume That the Market Demand and the Market Supply Are $$\begin{array} { l } Q _ { D } = 20 + 2 P \\Q _ { S } = 10 - 2 P\end{array}$$

Essay

Assume that the market demand and the market supply are governed by the following equations:
$$\begin{array} { l } Q _ { D } = 20 + 2 P \\Q _ { S } = 10 - 2 P\end{array}$$
(i)Is the demand consistent with the law of demand? Please justify your answer.
(ii)Is the supply consistent with the law of supply?