Let be a random variable defined as the number of hours slept per night by seniors in college. Let's suppose no one sleeps less than four hours or more than eight hours per night. The following probability function is given for . {0.15 for n = 4, 0.23 for n = 5, 0.19 for n = 6, 0.24 for n = 7, and 0.19 for n = 8}What is the expected value for N? Give your answer as a decimal.