Please answer the questions in the picture.

8-34 Flexible-budget variances, review of Chapters 7 and 8. Eric Williams is a cost accountant and business analyst for Diamond Design Company (DDC), which manufactures expensive brass doorknobs. DDC uses two direct-cost categories: direct materials and direct manufacturing labor. Williams feels that manufacturing overhead is most closely related to material usage. Therefore, DDC allocates manufacturing overhead to production based upon pounds of materials used. At the beginning of 2017, DDC budgeted annual production of 420,000 doorknobs and adopted the fol- lowing standards for each doorknob: Input 0.3 lb. @ $10/1b. 1.2 hours @ $17/hour Cost/Doorknob $ 3.00 20.40 Direct materials (brass) Direct manufacturing labor Manufacturing overhead: Variable Fixed Standard cost per doorknob $5/lb. X 0.3 lb. $15/lb. X 0.3 lb. 1.50 4.50 $29.40 ASSIGNMENT MATERIAL 323 Actual results for April 2017 were as follows: Production 29,000 doorknobs Direct materials purchased 12,400 lb. at $11/1b. Direct materials used 8,500 lbs. Direct manufacturing labor 29,200 hours for $671,600 Variable manufacturing overhead $ 65,100 Fixed manufacturing overhead $158,000 1. For the month of April, compute the following variances, indicating whether each is favorable (F) or unfavorable (U): Required e. Variable manufacturing overhead spending variance f. Variable manufacturing overhead efficiency variance g. Production-volume variance h. Fixed manufacturing overhead spending variance 2. Can Williams use any of the variances to help explain any of the other variances? Give examples