$7\mathrm{.}6$"How do different soil types affect the stability of foundations in civil engineering projects? What are the key factors influencing soil compaction and how does it relate to construction? Explain the concept of water table in groundwater hydrology and its significance in civil engineering design. How does the angle of repose impact the stability of slopes in earthwork projects? Discuss the fundamental principles of concrete mix design and their importance in achieving desired strength and durability in structures."