#20

            int[,] matrix = {
                { 2, 2, 3 },
                { 5, 5, 10 },
                { 3, 5, 4 },
                { 7, 2, 3 }
            };
            int lineIndexMatrix = 1;
            int columIndexMatrix = 0;
            int multiplyColumnMatrix = 1;
            int sumLineMatrix = 0;

            for (int i = 0; i < matrix.GetLength(1); i++)
            {
                sumLineMatrix += matrix[lineIndexMatrix, i];
            }

            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                multiplyColumnMatrix *= matrix[i, columIndexMatrix];
            }

            for (int i = 0; i < matrix.GetLength(0); i++)
            {
                for (int j = 0; j < matrix.GetLength(1); j++)
                {
                    Console.Write(matrix[i, j] + " ");
                }

                Console.WriteLine();
            }

            Console.WriteLine($"\nСумма {lineIndexMatrix + 1} строки: {sumLineMatrix}\nПроизведение {columIndexMatrix + 1} " +
                $"столбца: {multiplyColumnMatrix}\n");