Figure-1 shows the geological cross-section of a region comprising of three sites: A- raised ground, B- sediment fill and C- flat surface, located at equal source-to-site distance. Make use of your knowledge and with reference to the figure, comment on the following: a) Relative duration of the ground shaking observed at the three sites. b) Relative frequency content of the ground motions at the three sites. c) As part of land use planning to minimize earthquake damages, at which site you will prefer to construct short-period structures and long-period structures.