Could you please help me solve this question by using tree diagram? Thanks a lot!

Question 2 Emma is taking a pregnancy test. On an average, about 70% of women taking a pregnancy test are actually pregnant. 2% of women who are not pregnant get positive results by mistake. 1% of pregnant women get negative results by mistake. Use notation T = {positive test}, Pr = {pregnant}. 1. (4 points) Emma takes the test and it comes out positive. Given this, what's the probability that she is pregnant? 2. (4 points) She takes the test again, it comes positive again. Given two positive test results, what's the probability that she is pregnant? 3. (4 points) If the results of two test are (positive, negative). What's the probability that she is pregnant