You haven't said if you understood the help you received in your last post. I'm going to assume you did and carry on from there.
Both of these problems can be solved using a similar diagram My picture below shows a standard normal distribution with two blue lines. I haven't tried to put them in the right places for either problem but the method is what I think you need.
If you work out the probability of being in the area to the left of line 1, and also the probability of being to the left of line 2, the difference will tell you the probability of being between the lines.
In both questions that should take care of it.