Consider a call option with a strike price (X) of $100 that expires in six month (t=0.5). If the current stock price (S) is $100, the underlyings stocks volatility () of the stock is 0.2, and the risk free rate (rrf) is 5% what is N(d1)? The Excel NORMSDIST(z) function will be helpful for this problem.?

Please explain work. Thank you!