Scenario $3$: Online Shopping Checkout $($Advanced$)$Objective: Teach students how to handle more complex workflows with multiple decision points, exceptions, and parallel processes.Steps:$1.$ Start the process$\mathrm{.}2.$ Add items to the cart$\mathrm{.}3.$ Proceed to checkout$\mathrm{.}4.$ Enter shipping information$\mathrm{.}5.$ Choose a payment method. If the payment method is credit$/$debit card, enter card details. If the payment method is PayPal, redirect to PayPal for authentication. If the payment method is Cash on Delivery, confirm the order$\mathrm{.}6.$ Validate payment details. If the payment fails, notify the user and allow re$-$entry of details or cancellation$\mathrm{.}7.$ Confirm the order$\mathrm{.}8.$ Generate and send an order confirmation email$\mathrm{.}9.$ Prepare the order for shipping$\mathrm{.}10.$ End the process.

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