For a 4340 steel alloy, describe continuous-cooling/tempering heat treatments that would be required to yield specimens having

Question:

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