SOLVE A, B, AND C. THANKS

A 0.65 specific gravity gas flows from a 2 -in. pipe through a 1-in. orifice-type choke. The upstream pressure and temperature are 850psia and 85F, respectively. The downstream pressure is 210 psia (measured 2ft from the orifice). The gas-specific heat ratio is 1.3. (a) What is the expected daily flow rate? (b) Does heating need to be applied to ensure that the frost does not clog the orifice? (c) What is the expected pressure at the orifice outlet