FV and XIRR function

Problem 1:
Rate of Interest (ROI): 7.50% - Compounded Quarterly
Annual Rate Compounded: =FV(7.50%/4,4,0,-1)-1 ie 0.0771

Minimum Investment=Rs. 10 per month
Term = 5 years

What will be FV formula to calculate the following:

Net Return=

Net Return should be: Rs. 728.9


Problem 2:

I would like to know whether the xirr calculation showing correct result.

First a person invest Rs. 100000 in a MIS (Monthly Income Scheme) for 6 years from which he will get Rs. 666 per month as return. At the end of the scheme the Capital will be refunded to the investor.
Second the aforesaid Rs. 666 will reinvest into a Recurring Deposit (mentioned above) automatically.
What will be Internal Rate of Return?
In my calculation it is showing Less than the First calculation. In my opinion it should be more than First XIRR calculaton

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