Cutting shapes into n congruent parts

In this pic
http://www.2send.us/uploads/72d8e54e30.png
the first 4 shapes should be cut into 2 congruent parts, and the 5th one (it has a square hole) - into 3 congruent parts.

here,
http://www.2send.us/uploads/6705f6dd94.png
each shape should be cut into 4 congruent parts. In the left shape each part must contain one white dot.

You don't need to cut along the grid lines; they are there only to make the dimensions of the shapes clear.