Aband martha likes just released a new album a digital music service selling the song for 9.96. the service also allows a purchase of individual songs off the album. with 3 songs selling for 1.29 and 9 selling for 0.99, martha likes all of the 1.29 songs and 6 of the 0.99 songs. she is considering buying just those songs or buying the whole album. what is the better deal in terms of price per song?