The Sailors-Boats-Reserves database schema consists of three relations, whose schemas are: Sailors(sid, sname, rating, age) Boats(bid, bname, color) Reserves(sid, bid, day) Sailors Boats Reserves sid sname rating age bid bname color sid bid day 22 Dustin 45 101 Interlake blue 22 101 2020-10-10 29 Brutus 1 33 102 Interlakered 22 102 2020-10-10 31 Lubber 18 55.5 |103 Clipper Igreen 22 103 2020-10-8 32 Andy 8 25.5 104 Marine red 22 104 2020-10-7 58 Rusty 10 35 31 102 2020-11-10 64 Horatio 7 35 31 103 2020-11-6 71 Zorba 10 16 31 104 2020-11-12 74 Horatio 19 40 64 101 2020-9-5 85 Art 3 25.5 64 102 2020-9-8 95 Bob 63.5 74 103 2020-9-8 Figure 1: Instances of Sailors, Boats and Reserves Give a relational algebra expression for each of the following queries: Find all information of sailors wh have reserved boat number 102.

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Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.