Answer all questions with explanation

a) Find probability that the third ball you pick is white if the first picked is black. b) Find probability that the last ball you pick is white if the first picked ball is black.[:12 {1D points]: There are H boxes on the table each containing n1 white and n black halls. Assume you pick randomly! one hall from the rst box and put it In the second box. Then you pick randomly a hall from the second box and put it In the third box. The process is repeated until you pick randomly hall from the last, the H-th, hos