Calculation and selection of semiconductors for non-inverting buck-boost converter

hi everyone I have to select mosfets according to there voltage, current and Ron ratings of mosfets Please help me to calculate the maximum voltage and maximum current rating of the mosfets and Ron of the mosfets.

I used the software LT spice for non-inverting buck-boost converter here is circuit using LT spice.
Here make some calculation too please check is this the correct way to calculate the voltage and current ratings of mosfets.

Thanks