The mean of 13 numbers is 47. The mean of the first 3 numbers is 39, and that of the next 7 numbers is 49. The \(11^{\text{th}}\) number is 2 times the \(12^{\text{th}}\) number, and the \(12^{\text{th}}\) number is 3 less than the \(13^{\text{th}}\) number. Then the mean of the \(11^{\text{th}}\) and \(13^{\text{th}}\) numbers is: