Data for Questions 3 to 6 (caution: you will have to know spreads, collars, etc., very well to answer these questions); The following premiums are for one-year European options for an underlying asset with a current spot price of $100 : The risk-free annual effective rate of interest is 8.5%. In questions 3 to 9 , determine the net financing cost of the position, i.e., the excess of the premiums paid over the premiums received as of time 0 . 3. A 100-110 bull spread using call options. 4. A straddle using at-the-money options. 5. An 80-120 strangle. 6. A butterfly spread with a straddle using at-the-money options and with insurance using options that are out-of-the-money by $10