IF A & B are two partners, A partner has $15,000$ capital and the same amount for $B.$ They agreed to enter new partner C for having $50\%$ of the capital and income if he paid $25,000$ what is the amount of goodwill?

Select one:

a$.10,000$ for the old partners

b$.5000$ for the old partners

c$.5,000$ for a new partner

d$.10,000$ for new partner