Force acting on a particle varies with displacement as shown in figure. The work done from x=-4m  to x=+4m  is

Work done= Area of  Force−displacement graphW = Area of  ΔBCD+Area of ΔOAB+Area of ▭OAEF+Area of ΔEFGW= 12×2×−6+12×2×6+2×6+12×2×6Work done=12+6=18J