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The function

$x=(5\mathrm{.}9m)cos[(6ra\frac{d}{s})t+\frac{}{3}$rad$]$

gives the simple harmonic motion of a body. At $t=8\mathrm{.}0s,$ what are the $($a$)$ displacement, $($b$)$ velocity, $($c$)$ acceleration, and $($d$)$ phase of the motion? Also, what are the $(e)$ frequency and $(f)$ period of the motion?

$($a$)$ Number $$ Units $$

$($b$)$ Number $$ Units $$

$($c$)$ Number $$ Units $$

$($d$)$ Number $$ Units $$

$($e$)$ Number $$ Units $$

$($f$)$ Number $$ Units $$