9.2 From the start of the level change to the blue strips and float over the first pool of liquid, pass through the check point and change back to being all grey, the pickup at the bottom of the second pool of liquid by the right hand wall, as you drop in the current will push you to the left so hold right as soon as you hit the liquid to reach the pickup.
9.10 Change to the character with the green strips fall up as far as you can in the first section, jump up the block going to the right, you will now be in a very large area, fall up as far as you can and head for the upper left hand corner, the pick up is just a little way in from the left wall the you can reach with a jump.