Use a Phillip's #00 screwdriver to remove all of the circled screws. Apply moderate pressure to each screw to avoid stripping it.

The three screws circled in red are 9mm Phillip's #00 screws.

The three screws circle in orange are 5mm Phillip's #00 screws.

The three screws circled in yellow are 6mm Phillip's #00 screws.