Hey! Have you taken a look at this forum post Confusion with first problem of I.7 I.7 Universal gate sets? This might be a good place to start for I.7.1.
For I.8.1, would you be able to share some more details of the operations you have tried? Sharing your way of thinking would allow others to assist you better by narrowing down the scope, and it allows people to point where you might have gone wrong.