[co(en)₂ cl(ONO)]^{+ Shape of the complex ion}

 

Dear Student,

Kindly refer to the link for the method of the similar query.
Oxidation State of Cobalt in this case is +3 and number of un-paired electrons are 4.

https://www.meritnation.com/ask-answer/question/q1-for-the-complex-fe-en-2-cl2-cl-en-ethylenediami/amines/1599846

Hope this information clears your doubts about the topic

Keep asking!!

Regards