4 ptsj Using the relations Barsame, address) and Sells/bar, beer, price) find the names cf all the bars that are either on Main Street or sell Bud for less than $3. Express your solution in relational algebra [2 pts] Draw your relational algebra solution from the Problem #1 as an expression tree. 4 ptsj Using the relations Barsame, address) and Sells/bar, beer, price) find the names cf all the bars that are either on Main Street or sell Bud for less than $3. Express your solution in relational algebra [2 pts] Draw your relational algebra solution from the Problem #1 as an expression tree