Two wires A and B are of equal length. Each is attached at one end to the ceiling and to a weight at the other end. The cross-sectional area of A is 2.00 mm2 and that of B is 4.00 mm2. The Young's modulus for wire A is 1.80 x 1011 Pa and for B is 1.20 x 1011 Pa. If the weight suspended from wire A is 2.00 kg, what would the weight attached to wire B need to be to produce a) equal stresses in A and B and b) equal strains in A and B? Explain steps as you go.