please do part B as well. the last expert i asked got this question wrong.

An investment firm recommends that a client invest in bonds rated AAA, A, and B. The average yield on AAA bonds is 5%, on A bonds 7%, and on B bonds 12%. The client wants to invest twice as much in AAA bonds as in B bonds. How much should be invested in each type of bond under the following conditions? A. The total investment is $9,000, and the investor wants an annual return of $650 on the three investments. B. The values in part A are changed to $22,000 and $1,590, respectively. A. The client should invest $ in AAA bonds, $ in A bonds, and $ in B bonds