A deuteron contains a proton and a neutron and has a mass of \( 2.01355 \, \text{u} \). Calculate the mass defect for it in u and its energy equivalence in MeV. (\( m_p = 1.007277 \, \text{u} \), \( m_n = 1.008665 \, \text{u} \), \( 1 \, \text{u} = 931.5 \, \text{MeV/c}^2 \))