R1 be ce do 1에 21 3-. 2 4 700 RO a어 b c에. 1어 2- 2. 2어 1에 2-. 31 1에 2-.+ 4. For each of the following relational algebra expressions, draw the resultant relation in table form and write an equivalent expression in tuple relational calculus. a. RO M R1 b. l.c(RO) U Np,c(R1)-

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