4. Use R to solve this question. A professor is studying the relationship between cancer and certain genes. They have 3 genes (A, B and C) that are either present (1) or absent (0). They have drawn a sample of 142 people and determined whether they have or have had cancer (1). If they have not had cancer this is denoted by a 0. The dataset is called Cancer.csv and can be found in the assignments folder. Part A. [2 Marks] What is the probability that a person gets cancer