The meaning of these relations is straightforward. Primary key attributes are underlined. Thus SID is the primary key for SAILORS, BID is the primary key for BOATS, and all three attributes of RESERVES together form the primary key of RESERVES. Arrows indicate foreign keys. Attribute NO_OF_RED records the number of reservations of red boats by a sailor. Write (a) an SQL row level trigger and (b) an SQL statement level trigger that maintain the value of attribute NO_OF_RED every time a reservation is made.

Write a function balancechemical to balance chemical reactions by solving a linear set of equations. the inputs arguments are: reagents: symbols of reagents in string row array products: symbols of products in string row array elements: elements in the reaction in string row array elcmpreag: elemental composition of reactants in two dimensional numeric array elcmpprdcts: elemental composition of prducts in two dimensional numeric array hint: the first part of the problem is setting up the set of linear equations that should be solve. the second part of the problem is to find the integers from the solution. one way to do this is to mulitiply the rational basis for the nullspace by increasing larger integers until both the left-and right-side integers exist. for example, for the reaction that involves reacting with to produce and : reagents=["ch4", "o2"]; products =["co2", "h2o"]; elements =["c","h", "o"] elcmpreag=[1,4,0;