find the velocity, acceleration, and speed of a particle with the position function r(t) = v(t) = a(t) = |v(t)| =

find the velocity, acceleration, and speed of a particle with the position function

r(t) =<-5tsin(t), -5tcos(t), 7t^2>

v(t) = <_,_,_>

a(t) = <_,_,_>

|v(t)| =