What is the magnitude? PLSSS HELP (15 POINTS)!!

Answer:
i think the answer is -3m/s2 as there written no sign so it will be 3m/s2
Explanation:
we can see its an uniform decelaration
so we know
a=v-u/t
or a=2-26/8-0
so a =-24/8
so a=-3m/s2