Black & Sholes

1. S₀ = 100; K = 100; V = 30%; t = 0.25; R = 5%; C₀ = ?
2. S₁ = 101; K = 100; V = 30%; t = 0.25; R = 5%; C₁ = ?
3. S₁ = 99; K=100; V = 30%; t = 0.25; R = 5%; C₂ = ?

• Calculate d₁
• Calculate d₂
• Find N(d₁)
• Find N(d₂)
• Find C

I would be very grateful to you, if you could help me solve these