The force on a particle is given by F(t) = 0.71t + 1.2 t², in N. If the force acts from t=0 to t=2.0s, the total impulse is?
a) 1.2 kg m/s
b) 1.9 kg m/s
c) 4.6 kg m/s
d) 4.8 kg m/s
e) 6.2 kg m/s