SALT LAKE CITY (AP) — Gov. Gary Herbert has vetoed a bill requiring state offices to remain Monday through Friday because of public and employee support for the current four-day workweek.But Herbert says he issued an executive order to keep open critical state offices on Fridays after vetoing the bill Wednesday.Herbert opposed a return to the five-day workweek because of budget concerns and constitutional questions about the Legislature overstepping its authority.Herbert also vetoed three other bills Wednesday, including one earmarking some sales tax revenue to transportation projects, another changing state health insurance options and a third that used a Web-based tool to align education with the needs of the business community.Legislators need a two-thirds majority to override a veto, and leaders have two weeks to call a special session.