Read the passage on Alexander Fleming and answer the questions no. 4 and 5 :

Alexander Fleming was born in Ayrsnire , Scotland on August 6, 1881. He was the third of the four children. He attended a medical school in London and-graduated in medicine in 1906. Fleming assisted in. battled field hospitals during the World War I from 1914 to 1918. There he observed many people dying of infection. Once the War was over, Fleming looked for medicine that would heal infection. Then he came back to his laboratory and carried out. a lot of experiments to get a cure from inflections. At last he was successful in his mission. In 1928 he discovered Penicillin, a drug that is used to kill bacteria. Alexander Fleming died of heart failure in London in 1955.