Examine the following code written in $C$ where the first parameter is a string represented as a

character array and the swap function swaps two characters in the array.

a$.(10$p$)$ Draw the control flow graph for this function $($Use line numbers$)$

b$.(5$p$)$ Identify linearly independent paths for basis path testing $($Use line numbers$)$

c$.(10$p$)$ Provide test cases for boundary value analysis $($a separate table for each function parameter$)$