show why or why not
7. Ah, Venice just doesn't look the same these days, with...
7. Ah, Venice just doesn't look the same these days, with its picturesque streets, canals, and bridges devoid of tourists and locals alike (not to mention the ubiquitous gondoliers!). Given the schematic below of the bridges leading to and from the various land masses of Venice separated by canals, determine whether it is possible to make a complete tour of all of them on foot, crossing each bridge exactly once. CANNAREGIO SAN MARCO SANTA LUCIA CASTELLO CENTRO TROCHETTO SANTA CROCE DORSODURO ARSENALE SANT'ELENA