A particle moves on a straight line for 0≤t≤7 seconds. Its velocity satisfies v(t)>0 for 0<t<4 and v(t)<0 for 4<t<7. The net displacement over the whole interval is 4 meters. Which statement about the total distance traveled on 0≤t≤7 is true?
a) It equals 4 m.
b) It is greater than 4 m.
c) It is less than 4 m.
d) It cannot be determined from the information given.