python A dartboard of radius 10 and the wall it is hanging on are represented using the two-dimensional coordinate system, with the boards center at coordinate (0, 0). Variables x and y store x- and y-coordinate of a dart hit. Write an expression using variables x and y that evaluates to True if the dart hits (is within) the dartboard, and evaluate the expression for these dart coordinates:

a) (0, 0)

b) (10, 10)

c) (6, -6)

d) (-7, 8)