Which one of the following has an open circulatory system?

Which of the following statement$(s)$ is/are correct regarding the excretory system of a cockroach?
$(i)$ Excretion is performed by Malpighian tubules.
$(ii)$ They absorb nitrogenous waste products and convert them into uric acid,which is excreted out through the hindgut.
$(iii)$ In addition,fat body,nephrocytes,and urecose glands also help in excretion.

The figure given below shows the male reproductive system of a cockroach. Identify $P$,$Q$,and $R$.

Which is the correct sequence of labeling for the given figure?

Describe the male reproductive system of a cockroach.

Identify $X, Y$ and $Z$ in the given figure of the male reproductive system of a cockroach.