<image> As shown in the pie chart, it illustrates the planting areas of three types of fruit trees in an orchard. Please fill in the blanks.
(1) It is known that the planting area of apple trees is 4.2 hectares. The total area of the three types of fruit trees is ____ hectares.
(2) The planting area of peach trees is ____ hectares.
(3) The planting area of pear trees accounts for ____% of the planting area of apple trees.
(4) The planting area of peach trees is ____% less than the planting area of apple trees.