PLEASE SOLVE IT ASAP WITH CLEAR STEPS

A 60 wi\%6 Pb40 wt\% Mg alloy is rapidly quenched to room temperature from an elevated temperature in sueh a way that the high-temperature mierostructure is preserved This mierostructure is found to consist of the phase and MgaPb, having respeetive mass. fractions of 0.42 and 0.58 . Determine the approximate temperature from which the alloy was quenched. 4x)0.6x) d,floC Reprintod by permision of ASM Inteenatenal, Materiab Park, OII