Shall is a modal verb used in question form to&nbsp;ask for instructions or for formulating requests in a polite way.
<a href="https://open.books4languages.com/english-a2-grammar/chapter/questions-with-shall/">https://open.books4languages.com/english-a2-grammar/chapter/questions-with-shall/</a>

Open Educational Resources for Teaching and Learning English as Second Language which can be reused, modified, and shared and that provide unconstrained materials for the benefit and the enjoyment of others.

https://books4languages.com