Execute process task in ssis

Executable : C:\Program Files\7-Zip\7z.exe

Argument : example
e D:\Employees.7z -oD:\mahantesh

Source file path:D:\Employees.7z
Output path: D:\mahantesh
Expression:  "a "+ "\""+ @[User::zip_destFilepath]+ @[User::zip_outputfilename]+ "\""+" "+"\""+ @[User::zip_sourcefilepath]+ @[User::Filename]+"\""