Graph API query/filter

Greetings,

I have a project in a planner group, and I need to use Graph API to get all the tasks and details for each task, including comments.  Is there a way to use Graph API, to bring all details from my tasks, including latest comments(this is crucial for that)? I need to use Graph API to bring some informations from my planner. I was just introduced to Graph API, and I don't know how to use very well, and my deadline is this week. 

I tried using this link below, but its just getting the comments:

https://graph.microsoft.com/v1.0/groups/{group-id}/conversations

And this one below to get my tasks based on my plan ID:

https://graph.microsoft.com/v1.0/planner/plans/{plan-id}/tasks

For the second one, I need to include the lastest comments as well, when it is called

Thanks,