Document 1: Description of Morse Code (from Wikipedia)
Morse code is a method of transmitting ~text~ information as a series of on-off tones, lights, or clicks that can be directly
understood by a skilled listener or observer without special equipment. The International Morse Code encodes the
~ISO basic Latin alphabet~, some extra Latin letters, the ~Arabic numerals~ and a small set of punctuation and procedural
signals as standardized sequences of short and long signals called "dots" and "dashes", or "dits" and "dahs".
Each character (letter or numeral) is represented by a unique sequence of dots and dashes. The duration of a dash is three
times the duration of a dot. Each dot or dash is followed by a short silence, equal to the dot duration. The letters of a word
are separated by a space equal to three dots (one dash), and the words are separated by a space equal to seven dots.
The dot duration is the basic unit of time measurement in code transmission. To increase the speed of the communication,
the code was designed so that the length of each character in Morse varies approximately inversely to its frequency of
occurrence in English. Thus the most common letter in English, the letter "E", has the shortest code, a single dot.
Document 3: Dichotomic Search Table
In this table, the user branches left for every dot and branches right for every dash until the character is finished.
Consider each of the following statements. Does the information in the three sources support the inference as stated?
The international distress call SOS is considered a prosign; that is, the usual three-unit space between letters is not present. (This means SOS is essentially like one letter.) Given this information, it would take nine units to spell SOS.
It takes at least 70 units to send the phrase “morse code” in Morse Code.
The maximum number of possible characters that could be found in the dichotomic search table is 64.