Find the missing number in the table.
Below is the Export and Import data of a company. Which year has the lowest percentage fall in imports from the previous year?
The number of factors of 1800 that are multiple of 6 is …………. .
The number of real solutions of the equation \((x^2 - 15x + 55)^{x^2 - 5x + 6} = 1\) is __________.