The total linear momentum of a system of five particles at time t = 2.2 s is given by G_2.2 = 3.4i − 2.6j + 4.6k kg∙m/s. At time t = 2.4 s, the linear momentum has changed to G_2.4 = 3.7i − 2.2j + 4.9k kg∙m/s. Calculate the magnitude F of the time average of the resultant of the external forces acting on the system during the interval.