Consider the graphs of $f(x)$ and $g(x)$ below:

For each interval given below, decide whether the average rate of change of $f(x)$ is positive, negative, or zero over that particular interval.

Interval	Sign of Average Rate of Change of $f(x)$
$0 \leq x \leq 4$	? positive negative zero
$2.2 \leq x \leq 6.1$	? positive negative zero
$0 \leq x \leq 8$	? positive negative zero
$5.2 \leq x \leq 6.9$	? positive negative zero
$5.2 \leq x \leq 8$	? positive negative zero