how to solve it ?

Instructions to students: Answer TWO Questions only Question 1 The following cost and activity data were taken from the records of Prince Sultan Activity Units 80 86 87 94 95 97 104 Cost incurred SAR 656 692 683 698 707 703 712 Required: Calculate the fixed and variable costs using: a. High and low point method b. The least square regression analysis method c. Calculate the total cost for a 100-activity level (2 Marks). (6 Marks). (2Marks). Sy-an+bx Exy-Ex + EX2....... OR Transpose the normal equations and calculate the coefficients directly a-SyEx2 - EXEXY n (X2)-(x)2 b=nExy SXEY (x2) - (x2