Graphs of the position functions of two particles are shown, where t is measured in seconds. (Enter your answers using interval notation.) (3)1 .\\' ([32 J 9 to When '5 the VElDClty Of the particle positive? When is the velocity of the particle positive? When is it negative? When is it negative? When is the particle SPEEdWQ UP? when is the particle speeding up? when IS it SlUWing down? when is it slowing down? Suppose that the graph of the velocity function of a particle is as shown in the gure, where t is measured in seconds. 3 .. CD When is the particle traveling forward (in the positive directi n)? (Enter your answer using interval notation.) : When is it traveling backward? (Enter your answer using interval notation.) What is happening when 5