keys are underlined in each relation. Specify the following queries in relational algebra using above database schema.

1) Find names of sailors who have reserved a RED or a GREEN boat?

1.1) Can also define tempboats using UNION (how?)

1.2) What happens of v is replaced by ^ in this query?

please solve those question using relational algebra. please don't copy the answer from another chegg's question.

Sailors(sid: integer, sname: string, rating: integer, age: real) Boats(bid: integer, bname: string, color: string) Reserves(sid: integer, bid: integer, day: date) Boats: Reserves: Sailors: Sid Sname Rating Age bid bname color sid bid day 22 Dustin 7 45 101 Interlake blue 22 101 1998-10-10 29 Brutus 1 33 22 102 1998-10-10 31 Lubber 8 55.5 102 Interlake red 103 Clipper green 104 Marine red 22 103 1998-10-8 8 25.5 22 104 1998-10-7 32 Andy 58 Rusty 10 35 31 102 1998-11-10 64 Horatio 7 35 31 103 1998-11-6 71 Zorba 10 16 31 104 1998-11-12 74 Horatio 9 40 64 101 1998-9-5 85 Art 3 25.5 64 102 1998-9-8 95 Bob 3 63.5 74 103 1998-9-8