Leads from Face book ads

Hello,
I have been sent here from Zoho Camaigns. Hope I am not asked to go to CRM team from here.

If we want to track an facebook campaign, can it be done thru Zoho? For clarity, we are an B2C company and we only have leads and clients. we use the potential/deal as client module.
We have 4 Face Book ads, which we run on an total monthly budget of $ 3000. We want to track the monthly results and ROI of that campaign. How we do it right now is as follows
(1)One of the ads is attached.
(2) The leads are received by email as per the attached format.
(3) They are populated into Zoho CRM using an API and then the resultant tasks and activities happen

The issues we face
(1) What is our ROI on these campaigns on an monthly or quarterly basis
(2) What is the average time for conversion for leads from these campaigns. We have other sources of leads generation.
(3) How to identify which month's and from what ad is this lead generated
(4) Tracking each stage to identify improvement. Moving from new lead to establishing contact to setting up an meeting to conversion or any other stages.

Any help would be appreciated to understand if Zoho campaign, reports and CRM can help in getting the above answers.

Thanks

Pradeep