For problem 4.2, implement both the serial version and the pthreads version and measure the execution time of both.

4.2. Suppose we toss darts randomly at a square dartboard, whose bullseye is at the origin, and whose sides are 2 feet in length. Suppose also that there's a circle inscribed in the square dartboard. The radius of the circle is 1 foot, and it's area is square feet. If the points that are hit by the darts are uniformly distributed (and we always hit the square), then the number of darts that hit inside the circle should approximately satisfy the equation totalnumberoftossesnumberincircle=4, since the ratio of the area of the circle to the area of the square is /4. 4.14 Programming Assignments 207 We can use this formula to estimate the value of with a random number generator: number_in_circle =0; for (toss =0; toss x= random double between 1 and 1; y= random double between 1 and 1; distance_squared =xx+yy; if (distance_squared