Choose the answer which best identifies each person and their contribution: 1: a medieval music theorist who developed a system of lines and spaces that enabled musicians to notate the specific notes in a melody 2: is credited with composing the earliest polyphonic setting of the mass 3: a well-educated countess with an arranged marriage who took a lover and wrote poetry about her love that was put to music as a troubadour 4: an Abbess, artist, poet, scientist, and composer for the Church during the Middle Ages匹配题