We derived the Black-Scholes formula( f(t,x)=xΦ (d₁)-Ke-r(T-t)Φ(d₂) ) where( d₁=1/σ √T-t(log(x/K)+(T-t)(r+1/2σ²)) ) ( d₂=d₁-σ √T-t )Compute?