Find the number c that satisfies the conclusion of the mean value theorem on the given interval. (enter your answers as a comma-separated list. if an answer does not exist, enter dne.) f(x) = x , [0, 4]

Since opening night, attendance at play a has increased steadily, while attendance at play b first rose and then fell. equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. on what day(s) was the attendance the same at both plays? what was the attendance? play a: y = 8x + 191 play b: y = -x^2 + 26x + 126