Suppose a database has the following three relations. ArtItem (aid: integer, title: string, weightPnd: integer, type: string, pricePaid: integer) ExhibitsIn (artID: integer, exhibitID: integer, insuranceCost: integer, deliveryDate: date, homeMuseum: integer) Exhibition (eID: integer, title: string, curatorName: string, specialFee: integer) Visits(exhibitionID: number, lat: string, long: string, startdate: date, enddate: date) Location(latitude: string, longitude: string, name: string, address: string, country: string, phonenumber: string) (The "bit" data type stores 0 or 1. False or true. Booleans.) "lat, long" in Visits are a foreign key referencing "latitude, longitude" in Location. "exhibitionID" in Visits are a foreign key referencing "eID" in Exhibition. "exhibitID" in ExhibitsIn is a foreign key referencing "eid" in Exhibition. "artID" in ExhibitsIn is a foreign key referencing "aid" in ArtItem. The art item weights are measured in pounds.

You may assume simple boolean comparisons (<, >, ) work on dates.

Write the following queries in relational algebra. 1. Find the exhibition titles and exhibition identifiers, and location names, for exhibitions that have been displayed at location in the country "Peru" and at a location in the country "United States".