On the second one, I'm not sure if the professor has made suggestions about the topics or you are asking his/her advice on your own suggestions. So you may like to change the words 'take your suggestion' in the first sentence to make that clearer. It may be an idea to say briefly what the two topics are then change 'that' in the second sentence to 'decide'. A full stop after 'paper' then changing 'and I want to' to 'Please could you' would sound s bit better. Hope this helps and good luck with your assignments.