Remembering that s with characterize the 1st and 2nd order interactions in polyethylene (PE) [s = exp(-500/RT) = .43 and = exp(-2000/RT) = .034 at T = 25 c] derive an RIS conformational model for PDMB, which considers sterosequence. Explain all assumptions made and compare the conformatioanl flexibility/ diversity of PDMB with that of PE, as well as indicate the most likely regular repeating conformation for each polymer and which one have the larger and why?