Problem $08-12$ Algo $($Moving Averages and Exponential Smoothing$)$

Corporate triple A bond interest rates for $12$ consecutive months are as follows:

$9\mathrm{.}6,9\mathrm{.}4,9\mathrm{.}5,9\mathrm{.}7,9\mathrm{.}9,9\mathrm{.}5,9\mathrm{.}8,10\mathrm{.}6,10\mathrm{.}1,9\mathrm{.}9,9\mathrm{.}5,9\mathrm{.}8$

$($a$)$ Choose the correct time series plot.

$($i$)$

Monthly Interest Rate

$10\mathrm{.}8$

$10\mathrm{.}6$

$10\mathrm{.}4$

$10\mathrm{.}2$

$-10\mathrm{.}0$

$9\mathrm{.}8$

$9\mathrm{.}6$

$9\mathrm{.}4$

$9\mathrm{.}2$