We have $200$ documents: $75$ are really positive and the rest are really negative. We issued a query against the database of documents. The results are as follows:

The system returned $100$ documents $60$ of which are really positive.

Check all that apply:

Question $1$Select one or more:

$1.$

Recall$=\mathrm{.}8$

$2.$

Recall$=\mathrm{.}6$

$3.$

Precision$=0\mathrm{.}8$

$4.$

Accuracy$=$~$0\mathrm{.}66$

$5.$

Accuracy$=\mathrm{.}725$

$6.$

Precision$=\mathrm{.}6$