$1)$ First time, after page loads, we would like to see a page with $3$ clickable buttons, as shown below.

$2)$ After the first button is clicked.

$3)$ After the second button is clicked.

$4)$ After clicking the OK button, depending on the time of day the message should NOT display Hello First & Last Name! Instead,

Good morning before $12$pm noon,

Good afternoon after $12$pm noon, or

Good evening after $6$pm

followed by the first and last name the user entered.

$5)$ After clicking the third button.

$7)$ Your JavaScript should subtract the age entered from the current year from the browser. Ex$.$ If the year is $2021$ and the user entered $100,$ then s$/$he was born $2021-100=1921$