answer two questions about music history in 400-500 words

answer two questions about music in around 400 to 500 words.

please include one source or above.

the questions are in following description:

Rock music has a greatly expanded during the 1970’s, in terms of musical style and fashion and the styles were directly influenced by artists from the 1960s.

1. Choose an artist from the first half of the 70?s and describe how their music was an expansion and development of the ?hippie aesthetic.? (Include at least one song example supports your analysis.) And, explain any other significant contributions the group made to rock music.

2.Then, choose a starkly different artist from the second half of the decade and contrast their musical style with the first artist. In conclude, describe how both groups were influenced by artists and styles from the 60?s.