For each of the following clusters, confirm that the total valence electron count is consistent with the metal cage framework adopted: 

(a) [Ru₆(CO)₁₈]²⁻, octahedron; 

(b) H₄Ru₄(CO)₁₂, tetrahedron;

(c) Os₅(CO)₁₆, trigonal bipyramid; 

(d) Os₄(CO)₁₆, square; 

(e) Co₃(CO)₉(μ₃-CCl), triangle; 

(f) H₂Os₃(CO)₉(μ₃-PPh), triangle; 

(g) HRu₆(CO)₁₇B, octahedron; 

(h) Co₃(η⁵-Cp)₃(CO)₃, triangle;

(i) Co₃(CO)₉Ni(η⁵-Cp), tetrahedron.