with steps please

Q2. Muhammad Seif, a cost analyst, collected the following information concerning the operations of the Machining Department: Required: a) Use the high-low method to determine the cost function to estimate future costs. b) If a total of 5,200 machine hours are estimated for July, what would be the total operating cost of the Machining Department? c) If fixed cost is calculated as $5,300 and variable cost per unit is calculated as $9.70 using the regression method, then what would be the total cost for 5,200 machine-hours in July