A store is designing the space for columns of nested shopping baskets. Each column has a starting basket that is 11 inches tall, followed by the nested baskets (so 0 nested baskets means there’s just the starting basket). The store measured a column of 6 nested baskets to be 21.5 inches high and a column of 16 nested baskets to be 39 inches high. How much does each nested basket add to the height of the column? If the store design allows for 46 inches for each column, how many nested baskets fit in a column?