input: Write a function to automate the process of sending emails to a list of recipients. The function should take a list of email addresses as input, iterate over each email address, and send an email to each one.
  assert send_emails(["email1@example.com","email2@example.com"])==('Email sent successfully', 'Email sent successfully')
  assert send_emails([])==()
output: def send_emails(email_list):
      results = []
      for email in email_list:
          results.append('Email sent successfully')
      return tuple(results)