Using data from the following hypothetical cohort study on cellular telephone use and brain tumors conducted over a 5-year period, calculate the cumulative incidence (risk) for brain tumors among cell phone users. (Please round to 4 decimal places) Developed brain tumors Did Not Develop brain tumors Totals Cell phone users 56 2,509 2,565 No cell phone use 38 1,945 1,983 Question 7 options: 0.0218 0.3201 0.0126 0.0221