1.) What is the proper test to determine a cross-section challenge under the Duren 1s second prong. And, how to resolve if intertwined within the 'systemic exclusion' of the third prong?external factors ' are

2.) Whether or not, allowing the executing law-enforcement officers to enlarge the probable cause, search and seize, based on :
(a) What they are armed with the knowledge of ;
(b) that are net presented to the issuing authority ; and
(c) their interpretation of the Statutes, and not of the issuing authority
over-breadth' or 'particularity' concerns of the Fourth;
implicates the
Amendment?

3.) Whether or not a district court retain discretion to sequester a witness, irrespective of a party's attempt to designate, once an appropriate record is developed by the parties?

What is the proper test to determine a cross-section challenge under the Duren second prong, and how to resolve if intertwined within the 'systemic exclusion' of the third prong?