Listed below are the Young’s Modulus and Poisson’s ratio of different materials. material Young's modulas,E (gpa) poission ratio,μ Aluminum 69 0.334 Glass 50 0.22 Rubber 0.1 0.5 Steel 180 0.3 Concrete 17 0.1 Which of the listed material: a) Has the least resistance for deformation? Explain why. b) Has the least contraction strain? Explain why