10. Assume a system with N job positions. For job position i, the number of individual users in that position is U, and the number of permissions required for the job position is P. a. For a traditional DAC scheme, how many relationships between users and per missions must be defined? b. For a RBAC scheme, how many relationships between users and permissions must be defined?

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.