Black Scholes - Inputs and Expense Recalculation

Hi Carta Team,

For our Equity Controls, we are attempting to validate the inputs to the Black Scholes model. Would you be able to help us:

1. Tie the to the Interest Rates used using a reputable independent source

2. Confirm how the Expected Term is calculated and if we can recalculate and/or tie it to your source

3. Confirm how the Volatility is calculated and how we can tie it to your source data

4. After establishing the Back Schles FV how can we recalculate the expense for a given period? Do these expenses accrue daily/weekly or monthly after the vesting start date?