$($a$)$ Draw the vectors $a=($:$3,2$:$),b=($:$2,-1$:$),$ and $c=($:$8,1$:$).$

$($b$)$ Find, by means of a sketch, scalars $s$ and $t$ such that $c=sa+tb.($Round your answers to one decimal place.$)$

$s$~~ $$

$t$~~ x

$($c$)$ Find the exact values of $s$ and $t.$

$s=$

$$

$t=$

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