A wire of length 14 is cut into two pieces which are then bent into the shape of a circle of radius r and a square of side s. Then the total area enclosed by the circle and square is the following function of s and r ______________
If we solve for s in terms of r, we can reexpress this area as the following function of r alone: _____________
Thus we find that to obtain maximal area we should let r =____________
To obtain minimal area we should let r = _________________
