How to upgrad 32 bit EPM 11.1.1.2 to 64 bit EPM 11.1.2.1 on Linux

Hi,

I want to upgrade EPM 11.1.1.2 (32 bit) to EPM 11.1.2.1 (64 bit)

Oracle suggesed path is EPM 11.1.1.2 to EPM 11.1.1.3 and to EPM 11.1.2.1 (64 bit)

During this which upgrade option  I have to select

  EPM 11.1.1.2 (32 bit) to EPM 11.1.1.3 (64bit ) and to EPM 11.1.2.1 (64 bit)

or

 EPM 11.1.1.2 (32 bit)  to EPM 11.1.1.3 (32bit) and EPM 11.1.1.3 (64bit)  and to EPM 11.1.2.1 (64 bit)?

In which option we can use LCM without any issues and Risks

thanks

Sitaram