For a 4340 steel alloy, describe continuous-cooling/ tempering heat treatments that would be required to yield specimens having the following yield/tensile strength-ductility property combinations:
(a) tensile strength of 1100 MPa, ductility of 50%RA
(b) yield strength of 1200 MPa, ductility of 45%RA
(c) tensile strength of 1300 MPa, ductility of 45%RA
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