Write a JavaScript program to perform the following tasks:

• Declare a variable named aStr and assign a value of '-5' to this variable
• Declare a variable named aNumber
• Conver the aStr from the string to the number data type (base 10) and assign this value to the aNumber variable. Use a Number function (e.g. Number(aStr))
• Declare another variable named posNum and assign the absolute value of the aNumber variable to this variable. Use abs function (e.g. Math.abs(posNum))
• Print out the value of the posNum to the console. Using the console.log function

(this is only my first assignment so i still dont understand a lot of what is going on. i would like to understand each step taken if possible, thanks!)