A steel wire of length 4.7 m and cross-sectional area `3.0 × 10^(-5)` `m^2` stretches by the same amount as a copper wire of length 3.5 m and cross-sectional area of `4.0 × 10^(–5)` `m^2` under a given load. What is the ratio of the Young’s modulus of steel to that of