Dell Inspiron 5420 driver for ubuntu 32bit

Question

I need Dell Inspiron 5420 driver for ubuntu 32bit OS. LAN, Wireless network, Graphics does not work. How can get it? I ask a question in dell support but they didn't right answer to me.

after lspci:

00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) 00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04) 00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04) 00:1c.0 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 1 (rev c4) 00:1c.4 PCI bridge: Intel Corporation 7 Series/C210 Series Chipset Family PCI Express Root Port 5 (rev c4) 00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation HM77 Express Chipset LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04) 01:00.0 Network controller: Broadcom Corporation BCM43142 802.11b/g/n (rev 01) 02:00.0 Ethernet controller: Atheros Communications Inc. AR8162 Fast Ethernet (rev 10)

after sudo lshw -c network:

*-network UNCLAIMED
description: Network controller product: BCM43142 802.11b/g/n vendor: Broadcom Corporation physical id: 0 bus info: pci@0000:01:00.0 version: 01 width: 64 bits clock: 33MHz capabilities: pm msi pciexpress bus_master cap_list configuration: latency=0 resources: memory:d0500000-d0507fff *-network UNCLAIMED description: Ethernet controller product: AR8162 Fast Ethernet vendor: Atheros Communications Inc. physical id: 0 bus info: pci@0000:02:00.0 version: 10 width: 64 bits clock: 33MHz capabilities: pm pciexpress msi msix bus_master cap_list configuration: latency=0 resources: memory:d0400000-d043ffff ioport:2000(size=128) *-network description: Ethernet interface physical id: 2 logical name: eth0 serial: c8:7b:5b:3d:49:fb capabilities: ethernet physical configuration: autonegotiation=off broadcast=yes driver=beceem driverversion=5.2.45 duplex=full firmware=1.2 ip=58.97.150.14 link=yes multicast=yes port=twisted pair

after rfkill list all:

0: hci0: Bluetooth Soft blocked: no Hard blocked: no