A particle moving along the $x-$axis has its position described by the function

$x=(2t^3+1t+1)m,$ where $t$ is in $s.$

For help with math skills, you may want to review:

Differentiation of Polynomial Functions

Part A

At $t=4s,$ what is the particle's position?

Express your answer with the appropriate units.

View Available Hint$($s$)$

$x=$

$||$

Part B

At $t=4s,$ what is the particle's velocity?

Express your answer with the appropriate units.

View Available Hint$($s$)$

$v_x=$