On the basis of the 18-electron rule, identify the first-row transition metal for each o...

On the basis of the 18-electron rule, identify the first-row transition metal for each of the following:

a. [M(CO)₇]⁺

b. H₃CM(CO)₅

c. M(CO)₂(CS)(PPh₃)Br

d. [(h₃-C₃H₃)(h₅-C₅H₅)M(CO)]^-

(has linearly coordinated NO)

h. [M(CO)₄I(diphos)]^- (diphos = 1,2-bis(diphenylphosphino)ethane)