What are some of the hazards of using mysql commands

Which number on the image above correctly indicates the name of a folder in this url? a.1b.2c.3d.4

Which is the highest level of the hierarchy of needs model? a. humanity b. intrapersonal c. team d. interpersonal

In excel - calculate the actual increase/decrease from first quarter to the second quarter then subtract subtract first quarter value from second quarter total then divide result by first quarter value