What is another name for the Labrum?

In cockroaches,the tegmina are found on the ........

Which of the following statement$(s)$ is/are correct regarding cockroaches?
$(i)$ The body of the cockroach is segmented and divisible into three distinct regions - head,thorax and abdomen.
$(ii)$ Blood vascular system is of closed type.
$(iii)$ They are monoecious and both sexes have well developed reproductive organs.
$(iv)$ The development of $P. americana$ is paurometabolous,meaning there is development through nymphal stage.

In female cockroach,the $7^{th}$ sternum is $:-$

What type of vision is observed in cockroaches?

In cockroaches,the stink glands are found between which abdominal segments?