5. [8 points] The installation of a new heat exchanger is proposed for the batch crystallization step in an existing pharmaceutical manufacturing process. The heat exchanger costs $49,600 (installed) and saves $8000/yr in operating costs. Is this a good investment based on a before-tax analysis? Data: Internal hurdle rate (internal discount rate) = 12% pa. Taxation rate-40% 5-year MACRS depreciation used service life of heat exchanger = 12 yrs