sec exercises (aassume that linear index uses bytes to store the key and bytes to store the block id for the associated records what is the greatest number of records that can be stored in the file if linear index of size mb is used(bwhat is the greatest number of records that can be stored in the file if the linear index is also stored on disk (and thus its size is limited only by the second-level indexwhen using second-level index of bytes ( key valuesas illustrated by figure each element of the second-level index references the smallest key value for disk block of the linear index modify the function binary of section so as to support variable-length records with fixed-length keys indexed by simple linear index as illustrated by figure assume that database stores records consisting of -byte integer key and variable-length data field consisting of string show the linear index (as illustrated by figure for the following collection of records hello worldxyz this string is rather long this is shorter abc hello new world each of the following series of records consists of four-digit primary key (with no duplicatesand four-character secondary key (with many duplicates deer deer duck deer goat duck frog deer duck frog (ashow the inverted list (as illustrated by figure for this collection of records