Shade two more squares so that this grid has rotational syminetry of order 4.

Answer:
1) bottom row, next to the last (4th square going across)
2) second row, first square (1st column, next to the bottom)
Step-by-step explanation:
1) bottom row, next to the last (4th square going across)
2) second row, first square (1st column, next to the bottom)