Window>Align
Select all three objects holding shift and click to select
Ist - aligns on top to the left
2nd - aligns in the centre
3rd - aligns on top tot he right
4th - top right
6th - aligns to bottom right
Create some objects and then select them all
Choose Object>Blend>Options to choose the steps
Choose Object>Blend>Make
It uses the colours added tot he objects and blends them.
Blend Tool. Click on one anchor point on the red star and then on the yellow start with the Blend Tool
Choose>Object>Blend options
Click on one anchor point on one object and then on the other object
- I chose 100 and then Object>Blend>Make