Write a program in c++ that reads in an email address. The program should evaluate whether the email address is legal or not. To be considered legal, the email addresss should satisfy the following conditions: - It has to include exactly one @ symbol. - After the @ symbol, there should be at least one period. - The @ symbol cannot be the first character, there must be some other characters before it. - The last part, i.e. the part after the last period should be at least two characters and no more than four characters.