Acceleration Time Graph

Given the ${?}_{a-t}$ graph below describe what each characteristic means in regards to a particle moving with rectilinear motion.

$a(0)$

HA

$a^{\text{'}}(0)$

$a^{\text{'}}(b)$

$a^{\text{'}}(c)$

tin$(a,c)$

tin$(c,)$

tin$(a,0)$

$(a,0)$

$(b,f(b))$

$(c,f(c))$