A particle P moves on the number line shown in the figure below. P 5 {on) The position of the particle as a function of time, s(t), is shown in second figure. (CH) 4 t (sec) -1 -2 The graph of s(t) shown is not the path of the particle; it is a plot of the particle's position in centimeters against time in seconds. For each of the following, use interval notation, or enter DNE if no such intervals exist. Include the union symbol when entering multiple intervals. a. When is P moving right? Moving right: b. When is P standing still? Still: c. When is the velocity of P negative? Negative velocity