6. Add the displaying annotations to the Burger class to achieve the following: a. The heading for the price column should be displayed as 'Price Each'. b. The price field should show a '\$' sign before the price in the Index page and Details page, but not in Create page and Edit page. Hint: Consider DataType.Currency. 7. Add validation annotations to the Burger class to achieve the following: a. The burger name field is required, and can only consists of English letters, digits, spaces and underscore, and has a length between 5 characters and 15 characters inclusive. b. The burger price should be in the range from $10.00 to $20.00 inclusive. 8. Add the displaying annotations to the Customer class to achieve the following: a. The heading for the Date of Birth column should be displayed as 'Birth Date'. b. The Date of Birth field should only display the date part (i.e., exclude the time part). 9. Add validation annotations to the Customer class to achieve the following: a. The family name field is required, and can only consists of English letters, hyphen and apostrophe, and has a length between 2 characters and 20 characters inclusive. b. The given name: (same as above). c. The Email Address field is required and in a valid email format. d. The Mobile Number field is required and in the format of 04xxxxxxx (i.e., there should be a space in the fifth character and in the ninth character). The error