Two strain gauges fixed along the principal directions on a plane surface of a steel member recorded strain values of 0.0013 tensile and -0.0013 compressive respectively. Given that the value of E = 2 × 105 MPa and μ = 0.3, the largest normal and shearing stress at this point are
1
200 MPa and 200 MPa
2
400 MPa and 200 MPa
3
260 MPa and 260 MPa
4
260 MPa and 520 MPa