7. [6] [CO2] (a) Consider the input file "Covid19.tsv" with schema (HospitalID, HospitalName, day, month, year, Number_of_Covid_Tests) is loaded into the relation/variable A. Write Apache Pig statements for the following: (i) To find the tuples where Number_of_Covid_Tests > 1500 (ii) To group the tuples based on HospitalID (iii) To calculate mean Number_of_Covid_Tests per day