I know that we have to generate a stream for Exercise 1 (and of course to confirm results, you use stream->list on the stream)

What about the rest of the exercises?

For example, on Exercise 2, the output result of my function is a list containing the number of steps it takes for the first n numbers (starting from 1) to "collatz" to 1.

(collatz 1) takes 0 steps, (collatz 2) takes 1 steps, ect., So,

Let (num-of-steps n) be the function in question. Then,

(num-of-steps 5) outputs to the interaction pane  '(0 1 7 2 5)  ;; a list of the number of steps it takes for each of the first 5 numbers (starting from 1) to finish the collatz sequence.

Is this alright, or do you want a stream instead? I am letting the function perform the computation for the first "n numbers" because it allows me to verify my output.

 I assume that if it works for the first n numbers, then it also works for {n | n≥1, n ∈ N}.