What is a fair Jury?

People on the left are complaining that the Arbury trial jury has only 1 African American (when mathematically speaking assuming an representative sample there should be 3). So my question is how do we get a fair jury.

First the easy parts (I am completely sure about these two things)....

1) The process for forming a jury pool should lead to equal representation (a White person should be as likely as an African American).

2) There should be equal rules for the lawyers to follow when selecting a Jury (you can't change the rules based on the defendant).

But now the more difficult questions.

3) Should there be a racial quota on Juries? How would this work? It doesn't seem like this is fair to defendants or could possibly be allowed under the 14th amendment.

4) Should there be pre-emptory challenges (i.e. the lawyers rejecting a jury member who won't favor their client)? Note: getting rid of this can hurt a defendant of any race.

5) Sending out summons for a jury pool can be fair, but what if minorities are less likely to actually show up? How do you fix this problem, do you balance the jury pool racially?

Jury selection is part of the judicial system and can determine a defendants future. It must be based on rules and the rules must be followed without exception. So other than that... how do you design a system to ensure a fair jury?