problem: For the given problem definition:

The musical company wants to store the information regarding the musicians who perform on its albums. Each musician consists of a musician id, a name, an address and a phone number. Some of the musicians might encompass the same address and some of them might have more than one phone number. Each musician might play various instruments and an instrument and might be played by some musicians. Each instrument consists of name and a musical key. The album recorded has a title, a copyright date, a format and an album identifier. Each of the albums has a number of songs where a song consists of a title and an author. Each song might be performed by some musicians and a musician might perform a number of songs. One of the musicians of the song acts as a producer. The producer might produce several albums.

a) Sketch an E-R diagram.

b) Transform the E-R diagram to the Relational Schema.