is used to represent if -- then statements.1a) i) This statement can be rewritten as "If I am worried, then I
will not sleep." and the symbol is used to represent if -- then statements.
ii) This statement has the same meaning as part i).
b) The comma after the word worried splits the statement into two parts: "If ...., then ....". First write a symbolic representation of the statement "I will both work hard and not sleep". Then use that statement as the second half of an if -- then statement.