Given the following values for a data point:

$a(t)=0\mathrm{.}25($average distance to other points in the same cluster$)$

$b(1)=0\mathrm{.}75($average distance to points in the nearest neighboring cluster$)$

What is the Salbouetil score for thes poun?

a$.0\mathrm{.}67$

lb$.0\mathrm{.}50$

c$.0\mathrm{.}33$

d$.1$