Hi, Community, I would like to perform a field mapping. Would you be able to assist me?

Hi, Community,

• Create new lookup field Fund and SubFund in active fund investment
• Map this fields to auto populate from  Opportunity Fund and SubFund
• Rollup value from active fund investment where Fund and subfund is used to Products

I am having difficulty performing field mapping that is N:1. Could you please assist me with this?