Consider the following form that is used to log into a website. Please enter a valid email address. emma@ Password Don't have an account? Create one now Login Marks Suppose the form has the following functionality: . As the user types their email address, display a warning if the value contains invalid characters. . When the email address has been entered, check if it matches an valid account and enable the login button if an account was found. . When the user clicks the login button, check whether password matches the email address and log into the site if it does. Identify and justify how each of the functions described above could make use of the following types of scripting. (6 marks) 8b) 10 Issue Marks Using either JavaScript or PHP code, implement the following functionality. (4 marks) Declare a new variable named username. Assign username a string value of "John". Declare a second variable named greeting and assign a value by joining the string "Hello" with the value stored in username. Display the final value of the greeting variable. A B I U X x 5 C E 19 ABC KA 123 KK