1 2 3 4 1 _ _ _ _ 2 _ _ _ _ 3 _ _ _ _ 4 _ _ _ _ ACROSS 1) the most extreme possible amount or value 2) (usually followed by `to') having the necessary means or skill or know-how or authority to do something 3) a theocratic islamic republic in the middle east in western asia; ____ was the core of the ancient empire that was known as persia until 1935; rich in oil 4) scottish explorer who led arctic expeditions that yielded geographic discoveries while searching for the northwest passage (1777-1856) DOWN 1) a set of two similar things considered as a unit 2) a river in northeastern spain; flows into the mediterranean 3) a flat wing-shaped process or winglike part of an organism 4) range of what one can know or understand ** Scroll down for solution. ** Are you sure you want to peek? peak able iran ross