Today one of my friend hit me with his question that he want to start bitcoin mining but i am a noob too in mining thing so i though it is the right time to ask you guys about it
his pc has

2gb ram
Intel 2.8 Ghz processor
500 gb HDD
Internet - coming soon 500kbps download speed
 
and his mobile has(for web mining) :

2gb Ram
Intel 1.6 Ghz
Internet - download speed 4-5 mbps

he asked me 1.what pool should he use? 2.what software he should use and some additional information about this. precautions and guides are welcome too