100 kg of steam is available at 2 MPa and 800^◦C. 

a. Determine the maximum amount of shaft work that can be obtained from this steam in a non-flow process if the ambient conditions are 25°C and 1 bar. 

b. This steam will be used in a non-flow work producing process that reduces its pressure to 0.6 MPa and its temperature to 400°C. Determine the maximum amount of shaft work that could have been obtained in that process. 

c. Determine the maximum amount of non-flow shaft work that could be obtained from the steam available at the end of the process in part b.