# Global data products $=[\{"$id$"$: $1,$ "name": "Laptop", "price": $1499\},\{"$id$"$: $2,$ "name": "Smartphone", "price": $899\},\{"$id$"$: $3,$ "name": "Headphones", "price": $249\},]$ cart $=[]$ # Functions def display$\_$products$()$: print$("$Available Products:"$)$ for product in products: print$($f$"\{$product$[\text{'}$id$\text{'}]\}.\{$product$[\text{'}$name$\text{'}]\}-$ $$\{$product$[\text{'}$price$\text{'}]\}")$ def add$\_$to$\_$cart$($product$\_$id$)$: product $=$ next$(($p for p in products if p$["$id$"]==$ product$\_$id$),$ None$)$ if product: cart.append$($product$)$ print$($f$"\{$product$[\text{'}$name$\text{'}]\}$ added to cart."$)$ else: print$("$Product not found."$)$ def display$\_$cart$()$: print$("$Shopping Cart:"$)$ for item in cart: print$($f$"\{$item$[\text{'}$name$\text{'}]\}-$ $$\{$item$[\text{'}$price$\text{'}]\}")$ def calculate$\_$total$()$: total $=$ sum$($item$["$price$"]$ for item in cart$)$ print$($f$"$Total: $$\{$total$\}")$ # Main program while True: print$("$

$1.$ Display Products

$2.$ Add to Cart

$3.$ Display Cart

$4.$ Calculate Total

$5.$ Exit"$)$ choice $=$ input$("$Enter your choice: $")$ if choice $=="1"$: display$\_$products$()$ elif choice $=="2"$: product$\_$id $=$ int$($input$("$Enter the product ID to add to cart: $"))$ add$\_$to$\_$cart$($product$\_$id$)$ elif choice $=="3"$: display$\_$cart$()$ elif choice $=="4"$: calculate$\_$total$()$ elif choice $=="5"$: print$("$Thank you for shopping. Goodbye!"$)$ break else: print$("$Invalid choice. Please try again."$)$ Change this code into object oriented approach