The in$-$class exercise will test your practical understanding of the following.

$$ Proper Naming

$$ Variables

$$ Operators

$$ Type conversion

$$ Casting

Instructions:

$1.$ Ask the user to enter four numbers, three digits each!

$2.$ Save each number as four separate string variables.

$3.$ Convert all string inputs into double variables.

$4.$ Add the first three numbers and store the result in an integer variable called

$$firstThree$.$

$5.$ Add all numbers and store the result in an integer variable called $$totalSum$$

$6.$ Multiply the last two numbers and store the result in an integer variable called

$$lastTwo$.$

$7.$ Add the variables $$totalSum$$ and $$lastTwo$,$ saving the result as an integer

variable.

$8.$ Subtract the fourth number from the $$lastTwo$$ Variable.

$9.$ Output ALL results to the console.