Question

. ‘पश्यनतई ’ एतन्स्मन्पदे क: लकार: ?​

Answer 1

There is not word like पश्यनतई in Sanskrit. You might have mistaken. As far as I think of correction, it could be पश्यन्ति which indicates 3rd person (plural) seeing something.

So the answer to your question would be:

एशः लट् लकारः अस्ति।