$1.$ Consider the numbered Java code below.

$1.$ int $a=5,b=2$;

$2.$ double $c=3\mathrm{.}0$;

$3.a+=b$;

$4.b++$;

$5.c--$;

$6.c*=a$;

$7.$ System.out.println$("a+b+c="+(a+b+c))$;

$(a)$ Trace this sequence using a seperate row for each statement.

$(b)$ Confirm your output with a Java program that executes these commands.