a$)$ Draw an example of a queue and with reference to the diagram, describe removing an element from the queue $($code or pseudocode can be used$).$

$[3$ marks$]$

b$)$ How would removing an element differ if the queue was replaced by a stack? Describe the process of removing an element from a stack. $(3$ marks$)$ What is this process typically called? $(1$ mark$)$

$[4$ marks$]$