Question
D, E, F, G, H, I, J and K are sitting around a square
table facing the center of the table. Some of them are sitting at the corners while some are sitting at the exact center of the sides. K. sits third to the right of I. K sits at one of the corners. E sits second to the left of G. G sits at any of the corners. E is an immediate neighbour of I and D. F sits third to the right of J. H is the immediate neighbour of F and K. How many people sit between I and F, when counted from the left of I?Solution

Relational Algebra is
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