allocating partitions

[mahesh]

Hi,

I have an old 16.04 running dual boot. I wish to keep dualboot and home partition and only install 20.04. I dont understand how to allocate partitions

sda4 should be swap, like before, format
sda5 should be system, like before, format
sda6 home, like before, keep data

I am not sure where to put boot loader (I probably use GRUB, but not sure)

http://imgur.com/a/geTwSck

Grateful for assistance