$5\mathrm{.}6.$ Consider the following processes $P1$ and $P2$ that update the value of the shared vari$-$

ables, $x$ and $y,$ as follows:

Assume that the initial values of $x$ and $y$ are $2$ and $3$ respectively. $P1$ enters the system

first and so it is required that the output is equivalent to a serial execution of $P1$ fol$-$

lowed by P$2.$ The scheduler in the uniprocessor system implements a pseudo$-$parallel

execution of these two concurrent processes by interleaving their instructions without

restricting the order of the interleaving.

a$.$ If the processes P$1$ and P$2$ had executed serially, what would the values of $x$ and $y$

have been after the execution of both processes?

b$.$ Write an interleaved concurrent schedule that gives the same output as a serial

schedule.

c$.$ Write an interleaved concurrent schedule that gives an output that is different from

that of a serial schedule.