How to correctly link the path of external library in CMake?

Question

In the CMakeLists.txt, if I define the .lib (static library) file path as absolute path, it's working correctly. But if I define the same as relative path, an error is thrown. How do I solve it without hard coded ?

File structure:

|--D
|  |--Rohit
|  |  |--Sandbox
|  |  |  |--demo
|  |  |  |  |--src
|  |  |  |  |  |--abc
|  |  |  |  |  |  |--build
|  |  |  |  |  |  |--CMakeLists.txt
|  |  |  |  |  |  |--lib
|  |  |  |  |  |  |  |--foo.lib
.
.
|  |  |  |  |--workspace
|  |  |  |  |  |--xyz
|  |  |  |  |  |  |--foo2.lib

This way is working fine:

add_library(foo STATIC IMPORTED)
set_property(TARGET foo PROPERTY IMPORTED_LOCATION D:/Rohit/Sandbox/demo/src/abc/lib/foo.lib)

This way is throwing error:

add_library(foo STATIC IMPORTED)
set_property(TARGET foo PROPERTY IMPORTED_LOCATION "/lib/foo.lib")

My CMakeLists.txt path: D:\Rohit\Sandbox\demo\src\abc\CmakeLists.txt

This is error I'm getting: LINK : fatal error LNK1104: cannot open file '\lib\foo.lib'

Also if I want to include .lib file from some other folder (let's say foo2.lib file is present in xyz folder of workspace), How to define it ?