Most candidates did not attempt this number.  Those who did performed woefully exhibiting poor knowledge of Vectors. 

They should understand that the force F2 (40N, 045°)
 
  =     20√2   and F2  =  (θN, 135°) =   {  θ√2 }
         20√2                                            {     2   }
                                                         { -θ √ 2 }
                                                              {         2 }     
 
The resultant R = { 20√2}  +{   ½ (θ√2)}
                               { 20√2}    {− ½ (θ√2)}  and /R/2 =  20√2 + ½ (θ√2)  2 + 20√2 – ½ (θ√2)2                                            

 »  θ   =    30;    tan  x   =    5√2    »  x   =    8.13°  »  8°.
                                                 35√2
  direction of resultant force    =   082°.