The plot below shows training data for a classification problem, with class labels $=1,2.$

i$.$ How many training points are mis$-$classified for knn with k $=1?$

ii$.$ How many training points are mis$-$classified for knn with k $=3?$

iii. Using knn with k $=3,$ what is the predicted class for a test observation

at $($x$,$ y$)=(12\mathrm{.}5,5)?$