In this challenge, you will practice declaring variables of different numeric types and converting between them using explicit type casting. You will calculate the total cost of items in a shopping cart by declaring an int variable for quantity and a double variable for price per item, converting types as needed, and computing the total price.

Follow these steps:

• Declare and initialize an int variable called quantity (set it to 4);
• Declare and initialize a double variable called pricePerItem (set it to 3.75);
• Convert quantity to a double and store it in a variable named quantityAsDouble;
• Convert pricePerItem to an int and store it in a variable named priceAsInt;
• Calculate the total cost by multiplying quantity and pricePerItem and store the result in a variable named totalCost;
• Print all variables and their converted values to the console.

Example output:

Quantity: 4
Price per item: 3.75
Quantity as double: 4
Price per item as int: 3
Total cost: 15