How would you solve 7-17 and 7-18

What portion of service department 2's costs are allocated to P1 and to P2 under the direct method? Brief Exercises 7-17 through 7-20 require the following information about a joint production process for three products, with a total joint production cost of exist100,000. There are no separable processing costs for any of the three products. What percentage of joint cost is allocated to each of the three products using the sales value at split-off method? What percentage of joint cost is allocated to each of the three products using the physical units method