1. Define a procedure with one input variable and three output locals, that takes a three element list of numbers as input and produces as output the squares of those three numbers (using "x * x" to get the square of x).
2. Try changing the definition of join_two to use initialised declarations for two of its variables, so that it becomes more compact, using the format:
lvars
out1 = .... ,
out2 = .... ,
It will have only four declarations and no additional instructions, but
it will still work.