I want to merge /dev/sda2 into /dev/sda6 and the remaining partitions in /dev/sda5.
I have tried to follow instructions on various forums but have been unsuccessful. I have deleted and re-created partition, used Ubuntu USB to boot and merge partitions from there. But no success.
Please help.
Please look at the following screenshots of gParted and fDisk:

[![ScreenShot of gParted](https://i.stack.imgur.com/lGjht.png)](https://i.stack.imgur.com/lGjht.png)

[![ScreenShot of fDisk](https://i.stack.imgur.com/p6aeD.png)](https://i.stack.imgur.com/p6aeD.png)

PS: I am not using dual-boot.