If the survey shows that the improvements are feasible, the board shall cause to be prepared the following:
(a)
Plans and specifications of the improvements proposed to be constructed when the petition proposes the construction of improvements.
(b)
An estimate of the cost of the proposed improvements which may include an amount not in excess of 10 percent of the aggregate cost of the proposed improvements to create a reserve fund to be used and applied as additional security for the payment of principal of and interest on any warrants of the improvement district issued against assessments levied for the payment of the cost of the proposed improvement.
(c)
Statement of the proposed assessment for the cost of the proposed improvements apportioned to each tract of land in the proposed improvement district as the tracts appear on the last equalized district assessment book and to district-owned land in the proposed improvement district whether or not it appears on the last equalized district assessment book, which apportionment shall be according to the benefits that will accrue to each tract by virtue of the proposed improvements.