The code declares and initializes an array $emails. It contains ve email addresses
1. Calculate the length (number of characters) of the email address.
2. Calculate the number of words in the email address.
3. Convert all the letters in the email address to uppercase.
4. Convert the the rst character of each word in the email address to uppercase. (Although you do
not need to answer the question, please think: what do you observe in the converted string? What
might be the reason it does not match the result in step 2?)
5. Calculate the length of the user name in the email address. User name is the part in the front of
symbol `@.'