Some Websites impose certain rules for passwords. Write a method that checks whether a string is a valid password. Suppose the password rule is as follows: • A password must have at least 7 characters. • A password consists of only letters and digits. • A password must contain at least one letter and at least one digit. Write a program that prompts the user to enter a password and displays "Valid Password" if the rule is followed or "Invalid Password" otherwise.

solution needed in the javascritp

Write a program that removes all non-alphabetic characters from the given input. Ex: If the input is: -Hello, 1 world$! the output is: Helloworld The program must define and call the following method that takes a string as a parameter and returns the string without any non- alphabetic characters. public static String removeNonAlpha (String userString)

Assume that a password is valid if and only if it contains at least one letter, at least one digit, and at least five characters in t otal. Write a boolean method named isValidPassword. The method should receive a String and determine whether the String is a valid password. Examples: .isValidPassword ("557s3") should be true • isValidPassword ("55r17s3") should be true isValidPassword ("55753") should be false should be false isValidPassword("eftyh") isValidPassword("5783") should be false Tip: you may want to use the charAt method of the String class and the isDigit and istetter methods of the Character class.