Mosquito rackets

Q: There are some tools available in the market (of the shape of a racket or other types) that are used to kill mosquitoes. Some sort of potential difference/ short circuit type of phenomena takes place and the insect gets killed with a spark like sound. Is it permissible to kill an insect in this manner by giving it current?

Energy healing

Q: Is the concept and belief in Chakra or the body's energy points acceptable in Islam especially when applied in namaaz ie. sajdah? This is flaunted nowadays by radio station presenters as a benefit to get rid of negative energy.

Peers

Q: Who are the people who believe in Peer and what is the knowledge and understanding behind this and why are we not allowed to believe in them even though we respect a religion?