Q$4.$ Consider the following program, and judge whether the three integer side lengths can form a triangle. This triangle can be general triangle, an isosceles trangle or an equiateral triangle, and finally outputs the criangle type. $[$Note: The sum of the two sides is greater than the thisd side, and the absolute value of the difference between an$/$ two sides is less than the thurd gide, It can form a triangle$](6$ Marks$)$

a$.$ Draw the CFG of the program and calculate the full complexity.

b$.$ Write the basic paths covered.

c$.$ Design a set of $4$ test cases to meet the basic test path coverage criteria.

Following is the set of input data: