In the 1960s, this symbol
became universally identified as the peace symbol, and it still shows up from time to
time as a motif for T-shirts or jewelry. The peace symbol took its form from the
letters N and D—the initial letters in nuclear disarmament—as expressed in the
international semaphore code:
The peace symbol is formed by superimposing the lines in these two diagrams
(without the flags) and enclosing them in a circle.
Implement a method drawPeaceSymbol with the header line
void drawPeaceSymbol(double x, double y, double r)
that draws a peace symbol centered at the point (x, y) with a circle of radius r. Write
a subclass of GraphicsProgram to test your method.