The following gives a translation from numeric scores to letter grades.

Assignment 2: A >= 27
(34) B >= 20
  C >= 14
Assignment 3: A >=24
(30) B >=18
  C >=12
     
Assignment 4: A >=28
(36) B >=21
  C >=14
     
Assignment 5: A >=35
(44) B >=27
  C >=19
     
Assignment 6: A >=43
(54) B >=32
  C >=21
     
Assignment 7: A >=38
(50) B >=28
  C >=18
 
Exam  A >=46
(58) B >=33
  C >=22
 
Assignment 8:  A >=35
(45) B >=25
  C >=15
 
Assignment 9: A >=38
(48) B >=28
  C >=19
 
Assignment 10:  >=45
(56) B >=34
  C >=23
 
Assignment 11: A >=47
(60) B >=35
C >=23
 
Assignment 12:  A >=47
(62) B >=36
  C >=25