The UCL of the range chart is four and the LCL of the range chart is zero. Following are the raw data from your process. How many possible points of discrimination are there in the range chart?

$1\mathrm{.}0$

$2\mathrm{.}0$

$3\mathrm{.}0$

$2\mathrm{.}0$

$0\mathrm{.}5$

$1\mathrm{.}0$

$1\mathrm{.}0$

$2\mathrm{.}0$

$2\mathrm{.}0$

$3\mathrm{.}0$

$3\mathrm{.}5$

$0\mathrm{.}5$

$0\mathrm{.}0$