Can someone explain to me how to do mean absolute deviation. for example, i need to find it for #6 shown in the picture

The measure of angle 0 is 600 degrees

Which of the following is a solution of z^6 = 64i? 2(cos105° + isin105°) 2(cos120° + isin120°) 2(cos135° + isin135°) 8(cos15° + isin15°)

3. a sum of $2700 is to be given in the form of 63 prizes. if the prize is of either $100 or $25, find the number of prizes of each type.