The legislative budget analyst and auditor shall attend all budget hearings carried on by the executive budget officer and shall have access to all budget material submitted to, and all studies carried on by, the executive budget officer. The legislative budget analyst and auditor shall analyze the executive budget when prepared, with special reference to sources of revenue, trends in governmental spending and finance, policies followed and inconsistencies in such policies, and proposed new or substantially expanded or reduced areas of spending and prepare a report of that analysis for the legislative assembly. The legislative budget analyst and auditor shall report thereon to the appropriations committees of the senate and house of representatives in joint meeting and shall perform such services for such committees during the legislative session as they shall reasonably request. The legislative audit and fiscal review committee may call upon the legislative budget analyst and auditor for such assistance as it may deem necessary in the analysis of any audit submitted to such committee. Each department, institution, and agency shall furnish such records and information to the legislative budget analyst and auditor as requested by the legislative budget analyst and auditor in the performance of official duties.