4. 120 points) In a version of Unix/Linux, the user passwords are stored in the file /etc/shadow. Each record in the file consists of the user id (uid which is a non-negative integer) and the encrypted password. All the data is separated by blank spaces Write a bool function "enter" which takes an int uid and a string password, and returns true if the uid/password is in the file and false otherwise. You will need to use the function encrypt which takes a string and returns the string encrypted. 4. 120 points) In a version of Unix/Linux, the user passwords are stored in the file /etc/shadow. Each record in the file consists of the user id (uid which is a non-negative integer) and the encrypted password. All the data is separated by blank spaces Write a bool function "enter" which takes an int uid and a string password, and returns true if the uid/password is in the file and false otherwise. You will need to use the function encrypt which takes a string and returns the string encrypted