1.) Thats an assertion,and it has no proof,first of All,this world is a test,there will be prayers which will be answered,and prayers which will not be answered. If every single answered prayer is a coincidence,thats absurd,out of a billion muslims praying who have confessed to the power of prayer, How come all these billion muslims are saying prayer helps them so much,but yet according to the atheist,they're all lying? its an absurdity by the atheist.
2.)Thats an assertion with no proof.
3.) First of all Attributes proof are us,look at our perfection,Allah could've bore us without hands,or with skin cancer,yet we're alive and well.
4.) I wonder why all the rich people without God are depressed and drown themselves in Alcohol? I wonder why all these people who dont believe in God also fall into depression? Hmm...