2. (5 marks; questions to Suppose you have 16 compounds and you know exactly one contains an element you want. You can test for the presence of the element but doing so is slow and expensive. How can you find out which compound contains the element doing only four tests, all in parallel? Assuming you always test the group with the first compound in it and fifth compound contains the element, what are the results of the tests? 2. (5 marks; questions to Suppose you have 16 compounds and you know exactly one contains an element you want. You can test for the presence of the element but doing so is slow and expensive. How can you find out which compound contains the element doing only four tests, all in parallel? Assuming you always test the group with the first compound in it and fifth compound contains the element, what are the results of the tests