According to IS 456:2000, what is the theoretical value of the effective length of a compression member effectively held in position and restrained against rotation at one end, and at the other end restrained against rotation but not held in position?

According to IS 456:2000, the minimum percentage of high yield strength deformed (HYSD) bars in an R.C. slab compared with total gross concrete area is:

As per standard civil engineering provisions (IS 456), the nominal clear cover (in mm) to main reinforcement bars in footings, columns, beams, and slabs are respectively: