I already have the BE-2

I need the answer and the procedure of the BE-3 and BE-4

BE10-2 Hanson Company is constructing a building. Construction began on February 1 and was completed on December 31. Expenditures were $1,800,000 on March 1, $1,200,000 on June 1, and $3,000,000 on December 31. Compute Hanson's weighted-average accumulated expenditures for interest capitalization purposes. BE10-3 Hanson Company (see BE10-2) borrowed $1,000,000 on March 1 on a 5-year, 12\% note to help finance construction of the building. In addition, the company had outstanding all year a 10%,5-year, $2,000,000 note payable and an 11%,4-year, $3,500,000 note payable. Compute the weighted-average interest rate used for interest capitalization purposes. BE10-4 Use the information for Hanson Company from BE10-2 and BE10-3. Compute avoidable interest for Hanson Company