Hi, need help for these MCQ Questions:

Please provide some explanation or mathematical methods why choose that option:

Given, a population of 1000 people, 750 people test positive and 250 people test negative for a mosquito bite. If a randomly, chosen person has a negative test result, the probability of that person has the disease is 72%. The specificity of the test is 70%

Question: (i) the sensitivity of the test is closest to ___

a. 80% b. 60 % c. 70% d. 90% e. 50%

Question: (ii) the probability of a randomly chosen person having a positive test result given that he or she does not have the disease is closest to___

a. 10% b. 40% c. 20% d. 0% e. 30%