Dell Inspiron 15 3878 Maximum Memory and Storage Options

Good Day to all!

I have an inspiron 15 3878 ci3.

I wanted to know:

Whether an SSD can be installed together with HDD? (1tb HDD installed currently)

The maximum memory(ram) it can support? (it currently has a 4gb installed)

Whether multiple rams can be installed?

Thank you in Advance!!