Correction in Mandatory Exercise 1

Sample code 2 contained a small error :
west (+ (* 2 i) (* 3 j) )

instead of the correct expression:

west (+ (* 2 i) (* 3 j) 5)          

It has been fixed

Link: 
https://www.uio.no/studier/emner/matnat/ifi/INF3110/h18/undervisningsmateriale/obligs/mandatory-exercise-1-inf3110-2018.pdf