Lenovo G50-70 i7 First time Please Help

BIOS: InsydeH2O Version 03.73.069ACN26WW
Model: Lenovo G50-70
CPU: i7-4510U
Graphics: HD4400
Render : AMD Radeon HD 8500M
Memory: 12MB RAM
Realtek RTL8723BE Wireless LAN 802.11n PCI-E

Problem :

i have install El Capitan 10.11.6 successfully but i can't get WIFI and Audio working.