If an 800 N load is applied at the midpoint on a railing of total length (span) equal to three (3) meters and a maximum deflection of 20 mm (.02 m) is permissible: a) Find what the minimum height ( h ) must be for a pine board .04 m (4 cm) thick that will support the given load. b) Perform the same calculation if a 1040 steel material is used in place of the the pine wood (Hint: Need to change one variable in part ( a ) from above.)