orientation class

Mastery orientation can be encouraged by

In an orienteering class, you have the goal of moving as far from base camp as possible by making three straight-line moves. You may use the following displacement in any order: (a) veca,2.0 km due east (b) vecb,2.0 km 30^(@) north of east (c ) vecc, 1.0 km due west. Alternatively, you may substitude either -vecb for vecb or - vecc for vec. What is the greatest distance you can be from base camp the the end of the third displacement

Possible muber of orientations fo a subshell is :

A small plane area is rotated in an electric field. In which orientation of the area is the flux of electric field through the area maximum? In which orientation is it zero.?