Aparticle moves along a line so that its position at any time is t> 0 or t=0 is given by the function s(t)=()+(8t)+2 where s is measured in meters and t is measured in seconds. a) find instantaneous velocity at any time t. b) find acceleration of the particle at any time t. c) when is the particle at rest? . d) describe motion of the particle. at what values of t does the particle change directions