How to modify SLA's and send email notification

[Nolan Torres]

Hi Guys. I am exploring JIRA on how to change the SLA's and send email to notification. My plan is to incorporate SLA below;

1/ Time to first response within 2h

2/ Time to resolution within 4h

3/ Time to close after resolution within 3d.

Also, is there a way to send a notification to JIRA administrators if the ticket left idle for more than 6hrs?

Can you please help me to achieve the object shown above, thanks.  

[Amirul Ikhwan Omar]

You can refer to below documentation for 

SLA -https://confluence.atlassian.com/servicedeskcloud/setting-up-slas-732528967.html

Nofification -https://confluence.atlassian.com/adminjiracloud/configuring-email-notifications-776636790.html