Информатика 7 класс , как
работать со списками ?

                    a |                   s |          k

      5,000000 |   0,000000 |   0,000000

      9,000000 |   5,000000 |   1,000000

     13,000000 |  14,000000 |   2,000000

     17,000000 |  27,000000 |   3,000000

     21,000000 |  44,000000 |   4,000000

     25,000000 |  65,000000 |   5,000000

     29,000000 |  90,000000 |   6,000000

     33,000000 | 119,000000 |   7,000000

     37,000000 | 152,000000 |   8,000000

     41,000000 | 189,000000 |   9,000000

     45,000000 | 230,000000 |  10,000000

     49,000000 | 275,000000 |  11,000000

     53,000000 | 324,000000 |  12,000000

K = 12.0

                    a |                   s |          k

      5,000000 |   0,000000 |   0,000000

      9,000000 |   5,000000 |   1,000000

     13,000000 |  14,000000 |   2,000000

     17,000000 |  27,000000 |   3,000000

     21,000000 |  44,000000 |   4,000000

     25,000000 |  65,000000 |   5,000000

     29,000000 |  90,000000 |   6,000000

     33,000000 | 119,000000 |   7,000000

     37,000000 | 152,000000 |   8,000000

     41,000000 | 189,000000 |   9,000000

     45,000000 | 230,000000 |  10,000000

     49,000000 | 275,000000 |  11,000000

     53,000000 | 324,000000 |  12,000000

K = 12.0