Hello, I need help with the first question. how to create a variable in javascript to hold the current year (four degit year). thanks in advance

for information. prompting the user to input their name, which you will write to the page-just like you did fo above. . In addition to the instructions in the tutorial from the book, you will also add the following to this page: o Create a variable to hold the current year (four digit year). o Prompt the user to input their birth year (four digits). o Calculate the user's possible age by subtracting their entered year from the variable containing the current year. o Now, simply return the user's age with an alert message