You are given the following for a 1-year gap call option on a stock:

• The current price of the stock is 50.

• The stocks price follows the Black-Scholes framework.

• The stock pays no dividends.

• The continuously compounded risk-free interest rate is 0.06.

• The option price is 5.3919.

• N(d1) = 0.3745.

• N(d2) = 0.2776.

  Determine the change in option price if the trigger is decreased by 5. Hint: Find the volatility, then find the relevant K values.