QUESTION $4$

$4\mathrm{.}1$ Write a Java program called Stack$\_$Q$4$ for the following Stack pseudocode and show the output for the

remaining elements in the Stack.:

Plan:

Create stack S$1$

Add the element "This is the main OSA" to the stack

Add the element "for the module" to the stack

Add the element "Informatics $1B"$ to the stack

Print S$1$

Remove the last item in the stack

Print S$1$

$4\mathrm{.}2$ Convert the program in Q$4\mathrm{.}1$ to a Queue. The class name should be Queue$\_$Q$4$ and the reference

variable for the queue structure is Q$1.$