The locus of the centre of a circle, which touches externally the circle x2 + y2 - 6x - 6y + 14 = 0 and also touches the y-axis, is given by the equation
1
x2 - 6x - 10y + 14 = 0
2
x2 - 10x - 6y + 14 = 0
3
y2 - 6x - 10y + 14 = 0
4
y2 - 10x - 6y + 14 = 0