Answer: a) 
(b) 
(c) 
(d) 
Explanation:
The formal description of the given sets are as follows :-
a) The set containing the numbers 5, 9, and 27.
(b) The set that contains all the natural numbers less than 2.
(c) The set containing the empty string.
We know that in formal description, the empty string is denoted with 
.
Thus, the required set :
(d) The set containing nothing at all.
The exact match mode is the mode parameter that Katie should use to look for an exact match of the searched data
Further Explanation:
The VLOOKUP function in Excel helps us search for and retrieve information from a particular column in a table and lookups a value in the left-most column of the table. It has two modes of matching.
Exact matching – When you perform a range_lookup, an argument FALSE is defined to mean that there is an exact match of the return value.
- To achieve this, select a cell in your Excel worksheet
- Type =VLOOKUP in the type bar of the Excel sheet
- Select the value to look up and then select the data range
- Type the column number that you want to search and then type FALSE
- Press enter
Learn about VLOOKUP in Excel by clicking the links below
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B. Lossy compression algorithms are typically better than lossless compression algorithms at reducing the number of bits needed to represent a piece of data.
