A particle moves according to the position function: $r(t)=($:$t^2,sin(t),$exp$(t)$:$).$ Select all that apply.

The trajectory is confined to a plane.

Its speed at any time $t$ is given by $\sqrt[\phantom{2}]{(2t{)}^2+co{s}^2(t)+e^{2t}}.$

Its velocity at $t=0$ is :$.$

The acceleration can be zero at some time t $.$