A mysterious magical train has 45 rows. Every row can hold 4 children. At the first stop 100 children board the train. At the second stop 35 children get off the train and 45 children get on. At the third stop 58 children get off the train and only 11 kids get on the train.
Part A: How many children can the train hold?
Part B: How many empty seats are on the train after the third stop?
Part A: 180 children
Part B: 117 empty seats