Peremptory challenges may not constitutionally be used to exclude a potential juror from a trial on racial

Question:

Peremptory challenges may not constitutionally be used to exclude a potential juror from a trial on racial or gender grounds.
a. Must a criminal jury reflect the ethnic or racial diversity of the community? Explain.
b. Could potential jurors lawfully be rejected on the basis of their place of residence? Explain.