Assignment 6: category-partitionin this individual assignment, you must generate between 60 and 100 test-case specifications (i. e., generated test frames) for a simplified version of the replace utility, whose specs are provided below, using the category-partition method that we saw in class. make sure, when defining your test specifications, to suitably cover the domain of the application under test. finally, make sure to suitably use constraints (rather than eliminating choices) to keep the number of test cases within the specified thresholds .concise specification of the replace utility name: replace - looks for all occurrences of string from and replaces it with string to . it is possible to specify one or more files on which to perform the replace operation(s) in a single replace command. synopsisreplace opt -- []*where opt can be zero or more of ○ -b○ -f ○ -l ○ -i command-line arguments and options from : string to be replaced with string to .to : string that will replace string from .filename : the file(s) on which the replace operation has to be performed.-b: if specified, the replace utility creates a backup copy of each file on which a replace operation is performed before modifying it.-f: if specified, the replace utility only replaces the first occurrence of string from in each file.-l: if specified, the replace utility only replaces the last occurrence of string from in each file.-i: if specified, the replace utility performs the search for string from in a case insensitive way.