SSC CPO 13 Dec 2019 Shift 2 Paper

The average of twelve numbers is 58. The average of the first five numbers is 56 and the average of the next four numbers is 60. The 10^th number is 4 more than the 11^th number and the 11^th number is one less than the 12^th number. What is the average of the 10^th and 12^th numbers?