Problems installing PPA of gcc-arm-none-eabi

I am attempting to install the PPA of gcc-arm-none-eabi on Ubuntu 14.04 by following the provided steps below:

1). sudo apt-get remove binutils-arm-none-eabi gcc-arm-none-eabi
2). sudo add-apt-repository ppa:terry.guo/gcc-arm-embedded
3). sudo apt-get update
4). sudo apt-get install gcc-arm-none-eabi=4.9.3.2015q1-0trusty13
    or
    sudo apt-get install gcc-arm-none-eabi=4.9.3.2015q1-0utopic14

I get the following output on the final step:

E: Version '4.9.3.2015q1-0utopic14' for 'gcc-arm-none-eabi' was not found

or

E: Version '4.9.3.2015q1-0utopic14' for 'gcc-arm-none-eabi' was not found

Most likely I have made a newby error. Can you help me resolve this?