Identify the patterns or regular expressions match the following data entry conditions: a. any character except the letters ' x ', ' y ' and ' z '. b. a single letter between two digits. Question 2 Write PHP code to perform the following tasks. a. Create a student class. b. Create a student object. c. Set appropriate data to the student object. d. Show the student data in a single cell table. Question 3 Create a form to capture a staff code as a login security code in a staff profile web application. i. Write code to create the form that contains a data field and a button. ii. When the button is clicked, the staff code is validated to ensure blank is not allowed in the data field. iii. The staff code should be between 12 to 15 letters. iv. Display an appropriate message to inform the user if the format of the code is not valid