In a steam power plant operating on a reheat Rankine cycle, steam enters the high pressure turbine

Question:

In a steam power plant operating on a reheat Rankine cycle, steam enters the high pressure turbine at 15 MPa, 620oC and is condensed in the condenser at a pressure of 15 kPa. If the moisture content in the turbine is not to exceed 10%, determine
(a) The reheat pressure and
(b) The thermal efficiency (ηth) of the cycle.