for an experiment that involves countering the earth's magnetic field in an experimental area that is only 10cm^3, with only using an arrangement of wires and currents,

a) describe qualitatively how you would cancel out (N/S, E/W, Up/Down) components of earth's field

b) what quantities of this experiment are required? Name the quantities that need to be considered. (wire materials, number of loops, orientations, etc...)

c) if the experimental area is increased to 10m^3, what design changes are needed and how may this affect the experiment