IB Maths 2017 SL P1 TZ2 - Questions 1, 2 and 3 Arithmetic Series, Vectors and Normal Distribution

Past Paper International Baccalaureate Mathematics 2017 Standard Level Paper 1 Time Zone 2

Question 1 is about an arithmetic series; finding the common difference and the sum of the series.
Question 2 is about two perpendicular vectors
Question 3 is about the probability of events and the normal distribution.