Suppose data is available for an on-line music distributor. This data includes: song title, artist performing the song, date song purchased, amount charged for the song. Using only the information available in the distributor's data (song title, artist performing, date purchased, amount charged), which of the following can be determined using database or spreadsheet software?

a. The number of songs by a particular artist that were purchased on a given date.
b. The amount of money charged on the first day of any given month.
c. Whether the amount charged is the same for each song title.