How to setup wifi hotspot for Dell Vostro using Ubuntu 12.04 OS and Broadcom Wireless LAN Controller

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http://askubuntu.com – I am trying to setup my laptop as a wifi hotspot but it doesn't work. Here are some info that might help: lspci 12:00.0 Network controller: Broadcom Corporation BCM4313 802.11b/g/n Wireless LAN Controller (rev 01) I really need help. You can ask me to run codes just to see the configurations. Thanks in advance :) (HowTos)