Raj and Ravi establish a partnership with an equal investment of Rs$15,000$ each. After four years, the business has Rs $40,000$ in cash and owes Rs $52,000$ in unpaid bills. Raj and Ravi have personal cash of Rs $7,000$ each and no personal debt. What is the value of their partnership equity each?

a$.$ Business will remain solvent.

b$.$ Business will go insolvent.

c$.$ Can't say from the given data.

d$.$ Ravi and Raj can decide to make the business insolvent by not paying their personal cash.