A 3-storey building is proposed to be built in Yuen Long, New Territories. A project engineer is responsible for a foundation design for the proposed building (i) What should the project engineer obtain during his site investigation for the foundation design? What are your recommendations? List out five recommendations that you consider appropriate. (ii) The project engineer plans to obtain some soil samples in the ground investigation works. What would be your advice on soil sample collection and the corresponding laboratory tests to be adopted? (iii) Some rock samples were also retrieved from the boreholes. The project engineer found that most rock samples are limestone attached with some marble. What could be the most possible geological process on the limestone for the result of the above finding?