Is it possible to alloy copper with nickel to achieve a minimum

Is it possible to alloy copper with nickel to achieve a minimum

Is it possible to alloy copper with nickel to achieve a minimum tensile strength of 375MPa (54,400psi) and yet maintain an electrical conductivity of 2.5 x 106 (ohm-m)-1? If not, why? If so, what concentration of nickel is required? You may want to consult Figure a.