Ubuntu Kernel Updates Help on Ubuntu 16.0.4LTS

Hello I’m using Ubuntu 16.0.4 LTS . My system is up to date. My current kernel version is 4.13. I need little help that …1) Kernel updates automatically by the System Update Option or sudo apt-get Update/upgrade option ?
2) Kernel gets updated in Every LTS Release like in 16.0.4 LTS has 4.13 the 18.0LTS will upgrade my kernel ?
3) How to manually upgrade my Kernel in the easyest way ?
Please help me with this. Thank you very much

I’ve moved this to the https://community.ubuntu.com/c/support-help-requests category because this site isn’t designed to take tech support questions. Sorry. I’d recommend using one of the official support channels listed on the https://community.ubuntu.com/t/finding-help/712 page.