A particle leaves the origin with an initial velocity vec$(v)=(1\mathrm{.}81$hat$(i))\frac{m}{s}$ and a constant acceleration vec$(a)=(-4\mathrm{.}40$hat$(i)-1\mathrm{.}30$hat$(j))\frac{m}{s^2}.$ When the particle reaches its maximum $x$ coordinate, what are $($a$)$ its velocity, $($b$)$ its position vector?

$($a$)$ Number widehat$(j)$ Units

$($b$)$ Number hat$(i)+$ widehat$(j)$ Units