Question $1$ You are tasked with developing a simple online shopping cart system. In this system, users can choose products from three different categories: Electronics, Clothing, and Groceries. Each product category has multiple items, and users can select a quantity for each item. You will calculate the total bill for the user based on their selection and apply a discount if applicable. Product Information: o Electronics: Laptop: $$800,$ Phone: $$500$ o Clothing: T$-$shirt: $$20,$ Jeans: $$50$ o Groceries: Apples $($per kg$)$: $$3,$ Bread: $$2$ Requirements: User Input: o The user will input their choice of category using a number $(1$ for Electronics, $2$ for Clothing, $3$ for Groceries$).$ o After selecting the category, the system will display the available products in that category. o The user will choose an item and the quantity they wish to purchase. Control Structures: o Use a switch case to handle the user's category and product selection. o Use if$-$else statements to apply a discount of $10\%$ if the total purchase exceeds $$500.$ Looping: o After each purchase, the user will be asked if they want to make another purchase $($use loops to continue until the user chooses to exit$).$ Note. Provide Screenshots in your word document $4$ Operators: o Use appropriate arithmetic operators for calculations. o Use relational and logical operators for comparisons $($e$.$g$.,$ checking if total is above $$500$ for a discount$).$ Questions: a$)$ Write a java program based on the given scenario above. $(15$ Marks$)$ b$)$ Explain the role of each operator used in the program, including arithmetic and relational operators. $(5$ Marks$)$ c$)$ Why is a switch case used in this program, and how does it simplify decision$-$making compared to multiple if$-$else statements? $(7$ Marks$)$ d$)$ Explain how the loop in the program works. What type of loop is used, and why is it suitable in this context? $(8$ Marks$)$ e$)$ What would happen if you removed the if$-$else structure that applies a discount? Provide a code snippet showing this change and explain the impact on the total bill calculation. $(10$ Marks$)$ f$)$ Write an alternative version of the product selection using nested if$-$else statements instead of a switch case. How does this change affect the readability of the program? $(5$ Marks$)$