Nonsuspect classification are subjected to which level of review?

Which of the following is not a nonsuspect classification?

A Westernstate statute, as interpreted by its courts, results in the ability to sue an out-of-state corporation in any county in Westernstate but requires that a suit brought against a corporation formed under the laws of Westernstate be brought only in the county where that corporation has its principal place of business. Will this state-sponsored discrimination be permitted?

Westernstate seeks to reward its hardworking teachers by granting the children of all public school teachers the right to attend public universities in the state free of charge. In order to avoid disputes, the law creates this tuition-free status only for children whose parents lived and taught within the state throughout that child's high school career. Is the law valid?

The general outlines of "nonsuspect classifications" overlap significantly with:

Westernstate law requires that all persons over 6 foot 6 inches in height sit in the last two rows of movie theatres, concert halls, and similar public venues. Several "tall-ies" sue claiming equal protection violation. What is the standard of review which will be applied to the law?