9 A thermodynamic cycle is composed of the following reversible processes: isothermal expansion, 1-2; polytropic (n-4). 2-3; isentropic 3-1. The cycle operates on 0.25 bs of nitrogen for which the following data apply for the process 1-2; the expansion ratio r- 5; pr100 psia and ty- 800F. (a) Determine the p.V T at each point (b) QA and QR (c) mep (d) e (e) the speed in rpm to produce 250 hp assuming for every revohution 1 cycle is completed.