$2\mathrm{.}1$ External Interface Requirements

$2\mathrm{.}1\mathrm{.}1$ User Interfaces:

$2\mathrm{.}1\mathrm{.}2$ Hardware Interfaces:

$2\mathrm{.}1\mathrm{.}3$ Software Interfaces:

$2\mathrm{.}1\mathrm{.}4$ Communications Protocols:

$2\mathrm{.}2$ Functional Requirements:

This assignment about: A grade calculator that help students determine what grade you need $on$ the final exam $in$ order $to$ get a desired grade $in$ a course. The student just need $to$ insert the grades, along with the weights.

Note: I attach some $of$ the specifications for each interface, please $be$ specific and detailed, and answer each one.