In an S\&P500-linked Principal Protected Note issued by Regional Bank, if the PV of interest earned by Regional Bank is $57 on a $1,000 Notional Amount, what would be the participation rate for the retail investor if the embedded call option is valued at $90 per $1,000 notional 63% of the S\&P500 upside 40% of S\&P500 upside 55% of the S\&P500 upside 33.33% of S\&P500 upside 72% of the S&P500 return