Using Indexes when formulating queries: Consider the following table $($to answer next $2$ questions$)$

STUDENT $($StudentID$,$ LastName, FirstName, Address, Suburb, PostCode, State$)$

Note$1$: The attributes StudentID and PostCode are indexed.

Note$2$: The user wants the names of students who live in the suburb of Leeming.

Q$13.$ Let us assume that $6155$ is the postcode for Leeming only. Would the query shown below be an efficient way to retrieve the required information? Explain your answer.

SELECT firstname, lastname

FROM student

WHERE suburb $=$ 'Leeming';