$1)$ Use the diagram below and perform the following:

a$)$ Assign IP addresses to all of the interfaces $($remember routers have two interfaces$).$ For Subnet $1$ use addresses of the form $192\mathrm{.}168\mathrm{.}1.$xxx; for Subnet $2$ uses addresses of the form $192\mathrm{.}168\mathrm{.}2.$xxx$.$ Subnet $3$ addresses of the form $192\mathrm{.}168\mathrm{.}3.$xxx b$)$ Assign MAC addresses to all of the adapters. c$)$ If Host E sends a datagram to host A$.$ Enumerate the steps.