Exact solutions of the equation for a vector particle with zero mass and gauge symmetry for a field with spin 2

It is known that for a massless spin 2 field according to Pauli- 
Fierz theory there exists a gauge symmetry which extends 
the gauge symmetry in Maxwell electrodynamics. The gauge 
states for spin 2 field are determined by an arbitrary 4-vector 
field. These states do not contribute into observable physical 
quantities like an energy-momentum tensor. This leads to the 
task of finding and eliminating the gauge solutions from the 
complete set of solutions of the spin 2 field. Therefore, taking 
in mind the case of spherical symmetry, in the present paper 
we will construct the complete set of spherical solutions for 
Duffin-Kemmer-Petiau massles equation. The solving of this 
task is the goal of the present paper.