Optional Properties

type UserProfile = { name: string; bio?: string }
const user: UserProfile = {
	name: 'Alice',
	// bio is optional, so we can omit it
}

1. Create a type alias named UserProfile with:
   • required: name (string), email (string)
   • optional: bio (string), website (string)
2. Type the provided alice and bob objects as UserProfile
   • Keep alice without bio or website (they should be omitted)
   • Keep bob with a non-empty bio string and a website that starts with http
3. Create a displayUserInfo function that logs name, email, and safely handles missing bio / website (for example with ?? defaults)
4. Export alice and bob (grading checks these two exports)