project maria garcia vince brief project maria garcia promigas partnership others wants acquire 80 mm tvcable company mexico promigas ownership would 25 e 20 mm 10 mm would come debt enron wants participate deal offer promigas loan guarantee exchange call options 50 promigas equity tvcable following suggestions made 1 get market quote loan guarantee use credit risk model price guarantee internally need speak vasant 2 find comparable company study volatility using company value histogram economics model crystal ball output fit lognormal distribution find volatility 3 calcalte call option value find braek even strike inputs extremely welcome zimin