In AMPscript, I need help with the coding part of this exercise. I need the code for the pre$-$fill and the update. Please don't provide an AI generated solution, as they do not work :

$1.$ Create four Data extensions:

"Subscribers" with subscriber attributes: SubscriberKey, FirstName, LastName, EmailAddress, PhoneNumber, BirthDate, Gender, Country, LastUpdated Date

$*"$Newsletter$"$ with information about newsletter subscribers: SubscriberKey, Subscribed $($true$/$false$),$ LastUpdatedDate

$*"$SpecialOffers$"$ with information about newsletter subscribers: SubscriberKey, Subscribed $($true$/$false$),$ LastUpdatedDate

$*"$Events$"$ with information about newsletter subscribers: SubscriberKey, Subscribed $($true$/$false$),$LastUpdatedDate

$1.$Fill data in above data extensions with dummy data

$2.$Create a simple email with a link at the bottom that says $$Update your preferences" which takes the subscribers to the Custom Profile & Subscription Center you are going to build.

Create a Custom Profile & Subscription center on a CloudPage with the following fields:$$FirstName $($text field$),$

LastName $($text field$),$

EmailAddress $($text field$),$PhoneNumber $($text field$),$BirthDate $($date field$),$Gender $($drop$-$down list with options male$/$female$/$prefer not to say$),$ Country $($drop down or text field$)$

Three checkboxes for subscription preferences:

$*$Newsletter$,$

$*$Special Offers,

$*$Events$.$ Any changes to attributes should be updated in the Subscribers Data Extension. The checkboxes for each communication type should be reflected by a subscribed field in a relevant Data Extension $($true$/$false$).$ For each form submission, LastUpdatedDate needs to be written into a Data Extension.

Make sure the form is pre$-$populated with data when a subscriber visits the website.