(Undated) -- Graduation ceremonies for the Class of 2018 were held for several institutions of higher learning in Rhode Island this past weekend. Providence College sent its 100th graduating class through the doors of the Dunkin' Donuts Center on Sunday, with author David McCullough serving as the commencement speaker. The former EPA administrator during the Obama administration, Regina McCarthy, spoke to the University of Rhode Island's graduating class yesterday, the 132nd commencement for that school. Ceremonies were also held at Roger Williams and Bryant universities on Saturday, and Johnson and Wales University on Friday.