Help with 9.8 and 9.9 please

Calculate the variable overhead efficiency variance using the formula approach. Calculate the variable overhead spending variance and variable overhead efficiency variance using the three-pronged graphical approach. what if 26, 100 direct labor hours were actually worked in February? What impact would that have had on the variable overhead spending variance? On the variable overhead efficiency variance? Calculating the Fixed overhead spending and volume variances Standish Company manufactures consumer products and provided the following information for the month of February: Calculate the fixed overhead spending variance using the formula approach. Calculate the volume variance using the formula approach. Calculate the fixed overhead spending variance and volume variance using the three- pronged graphical approach. What if 129, 600 units had actually been produced in February? What impact would that have had on the fixed overhead spending variance? On the volume variance? Calculating the Direct Materials Mix variance Mangia Pizza Company makes frozen pizzas are sold through grocery stores. Mangia developed the following standard mix for spreading on premade pizza shells to produce 16 giant-size sausage pizzas. Mangia put a batch of 2,000 pounds of direct materials (enough for 800 frozen sausage pizzas) into process. Of the total, 700 pounds were tomato sauce, 840 pounds were cheese, and the remaining 460 pounds were sausage. The actual yield was 780 pizzas. Calculate the standard mix (SM) in pounds for tomato sauce, for cheese, and for sausage. Calculate the mix variance