In February 1955, a paratrooper fell 370 m from an

In February 1955, a paratrooper fell 370 m from an airplane without being able to open his chute but happened to land in snow, suffering only minor injuries. Assume that his speed at impact was 56 m/s (terminal speed), that his mass (including gear) was 85 kg, and that the magnitude of the force on him from the snow was at the survivable limit of 1.2 x 105 N. What are?
(a) The minimum depth of snow that would have stopped him safely and
(b) The magnitude of the impulse on him from the snow?