(3) ( 8 pts) Clearly symbolize the hypotheses and the conclusions of the argument using appropriate symbols and logical connectives. Then, write the entire argument symbolically (in the form AB ). If the argument is valid, present a proof sequence. Otherwise, justify that the argument is invalid. If it is not hot then the weather is mild. If it is not snowy then the weather is mild. It is impossible that it is hot and also snowy. Therefore, the weather is mild