1. Identify two primitive and two non-primitive cells of the two-dimensional square lattice which are not given in Figure.
![1041_Figure.jpg](https://secure.tutorsglobe.com/CMSImages/1041_Figure.jpg)
2. Draw the two-dimensional lattice whose primitive translation vector of the lattice is 2aix+aly. Show two primitive and two non-primitive unit cells, one of each should be non-rectangular.