partitioning - How to get out unallocated space out from an extended ext4 partition

I have an extended partition /dev/sda2. It has many partitions of my ubuntu.
I want to resized them and get the unallocated space out for a windwos install.

But Whenever I try to do this in gparted live, It says you can resize on right click but when I try to do it, it dosen't happens. It says max and min space are equal.

Please help me. Before is its screenshot.