Q$1.($a$)$ What values are printed to the screen when the following C code is executed? Explain your reasoning clearly. int x $=5,$ y $=2$; float z; z $=$ x$/$y; printf$("\%\mathrm{.}4$f

$",$ z$)$; z $=($float$)$y$/$x$--$; printf$("\%$f

$",$ z$)$; x $\%=$ y; printf$("\%$d

$",$ x$)$; $(30\%)($b$)$ Describe the effect of each of the following lines of C code. Explain your reasoning. What are the values in the array a after the code has executed? int a$[4]=\{1,5,2,7\}$; int $*$aptr; aptr $=$ a; aptr$++$; aptr$[0]=0$; aptr $=$ a$+2$; $*($a$+2)=$ aptr$[1]$; aptr$[1]=*$a$+1$; $(35\%)($c$)$ Define a structured data type called struct complex which may be used to represent a complex number consisting of a real part and an imaginary part. Use the typedef mechanism to give your data type the new name Complex. Write a function called distance which calculates the distance between two complex numbers in the complex plane. The function should have prototype float distance$($Complex z$1,$ Complex z$2)$; Note that the distance between two complex numbers in the complex plane is given by where and are the real part and the imaginary part of the complex number $,$ respectively, and and are the real part and the imaginary part of the complex number $,$ respectively.