Need help I’m very confused

The ages of personnel in the accounting department of a large company are normally distributed with a standard deviation of 7 years. there is a 0.02275 probability that the age of any randomly chosen person in the department is less than 22 and 0.15866 probabilty that the age of any randomly chosen person is greater than 43. what is the mean of this distribution?

Aboy who is 1.8 meters tall stands 1 meter away from a lamppost and casts a shadow 2 meters long. the height of the lamppost meters.

Finley's pumpkin had a mass of 6.5 kilograms before he carved it. after carving it, the pumpkin had a mass of 3.9kg. what was the percent decrease in the mass of the pumpkin?