Help with Video Camera "blocks"

[catsandbooks]

Zone 2:

Row 2, column 2 Row 3, last column Last row, column 3

Zone 3:

First row, last column Row 2, column 3 Row 5, column 2 Row 5, column 5

[ChristinaSluth]

Sorry!

Doing the Master Sleuth level

[catsandbooks]

Please remember to tell us which level you are playing, especially when asking for spoilers.

[ChristinaSluth]

Hey guys, just started and I need help with the video camera "blocking" (preventing the cameras from seeing you. I completed the first level, but so stuck on the last two. Spoilers welcome!