Cu alloy C82500 has the approximate composition 98 wt.% Cu - 2 wt.% Be. C82500 can be precipitation hardened (see the Cu-Be phase diagram below). The precipitate phase (denoted as !2 in the phase diagram) is CuBe, which has the CsCl structure that is a simple cubic with Cu atoms at the unit cell corners and a Be atom in the cell center. Describe the heat treatment steps you would like to precipitation harden C82500. Explicitly state the temperature ranges that could be used for each step.