Where is Challenge map 5 for Assassins Creed 2 discovery ds

challenge map 1 is in escape the ambush in block 3 underground in a deep gap in the ground near a ramp
map 2 (?)
map 3(?) (i apologise as i have not yet located these)
map4/5(?)
map 7 is in protect the civillians from the inquisitors. kill the two red guards go up and kill the archer. get on the left wall and kill the second archer. circle back to the start and there is another archer. the map is behind him.
there are also maps in escape the tower (block 6) behind the three guard captains.
and find christoffa (block 7) after the ramp where you land clamped to the black wall, drop down and proceed right. it is there after a cutscene where a guard captain spots you.