The table below shows values of two functions, $f$ and $g\text{.}$ The three other functions are defined as follows:

• $M(x) = f(x) + g(x)$
• $N(x) = f(x) - g(x)$
• $P(x) = f(x)\cdot g(x)$

Complete the table of values for $M(x)\text{,}$ $N(x)$ and $P(x)\text{.}$