please answer all parts of the question with detail and steps

8-25 Flexible-budget variances, review of Chapters 7 and 8. (LO 4) 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 labour. Williams feels that manufacturing overhead is most closely related to material usage. Therefore, DDC allocates manufacturing overhead to production based upon kilograms of materials used. 309 At the beginning of the year, DDC budgeted annual production of 420,000 doorknobs and adopted the following standards for each doorknob: Actual results for the month of April were as follows: Required 1. For the month of April, compute the following variances, indicating whether each is favourable (F) or unfavourable (U): a. Direct materials price variance (based on purchases) b. Direct materials efficiency variance c. Direct manufacturing labour price variance d. Direct manufacturing labour efficiency variance e. Variable manufacturing overhesd 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 examoles