Question 10. such that 0xi Question 11. What is the number of integer solutions of the equation x1 + x2 + x3 = 20 for each 1≤i≤3? Consider the following statement: "At least d students in CSC281 course were born in the same month." 50, Suppose the actual number of students registered for CSC281 is 145. What is the maximum number d for which it is certain that statement is true?