15. Only eight people have tickets for 2 prizes in a school draw. Once a ticket is drawn for a prize, it is not re-entered in the draw. What is the probability that Annabelle wins the first prize, and James wins the second prize (assuming that each has one ticket)? The answer to three decimal places can be written in the form, 0.0kv. The values of k and v, respectively, are ____ and ____