What is the difference between " an important task" and "urgent task" and which one you will do first ?

The Urgent task it is a task you have to do it sudden and when an issue happen or event 

but the important task it is one of the task which is daily or monthly you have to do it upon to the proiarity case

Important task is the one, the impact of which is high and may effect organization's activities. While urgent task is an emergency work that arose because of some situation.

I will evaluate the impact of task and then act accordingly, that is to say if my refusal to take urgent action will lead to resignation of employee, who have committed fraud. Then I shall tell management to detain him, till he is ready to pay off embezzled money and halt writing an important audit report for a while.