Which key is used to indicate the end of a selection in a TELEX call via an Inmarsat-B SES?

Which number, if typed at an Inmarsat-B SES by a vessel in the Western Atlantic, would result in placing an automatic TELEX call to a subscriber number of 123456?

Which of the following numbers is appropriate for an Inmarsat-B terminal placing a TELEX call via Southbury to another ship logged-in to the AOR-E?

You are on a ship in the Pacific ocean. What keyboard entry would you make on an Inmarsat-B terminal to obtain a TELEX connection via Santa Paula to another ship that is 300 miles west of San Francisco?

What keyboard entry would you make on an Inmarsat-B terminal for an automatic TELEX connection to 882419 in Nebraska, USA (TELEX country code 230)?

Which of the following is a correctly formatted Inmarsat-B address for sending communications to a shoreside TELEX terminal number 440122 in the United Kingdom (TELEX country code 51)?