PLEASE HELP!!

For the gas compositions given below, design a line heater for a well flowing at 17 MMscfd into a line heater at an inlet pressure of 1200 psig after choking. The gas line heater has a choke at the entrance with a single coil downstream. Assume at the wellhead that flowing tubing pressure is 4500 psig and temperature is 130F. A gas condensate is produced at a rate of 30.0 bbl/MMscf with a specific gravity of 0.81. Find the total heater duty required for a single 3 in XX coil downstream of choke, minimum coil length, and fire tube area for a required heat flux of 10000 btu/hr ft?. Suggest heater size (shell diameter, shell length, fire tube rating, coil length, and number of passes). Assume constant water bath temperature of 195F. Note: the gas stream was initially saturated with brine (3% salinity) under reservoir conditions of 6000 psia and 1679F. Use Fig 2-11 in the text for estimating the overall heat transfer coefficient (U). Component % Mole methane 79.63 ethane 8.76 propane 4.23 isobutane 0.84 normal butane 1.05 isopentane 0.46 normal pentane 0.46 hextane 0.92 1.91 heptane plus carbon dioxide 0.39 hydrogen sulphide 0.00 nitrogen 1.35