NRG Energy is a multi-divisional utility company. NRG Energy has four divisions with the following betas and proportions of the firms total assets: Electric & Gas, Beta 1.48, % of Assets 25; Bus transportation, beta 1.10, % of assets 30; real estate, beta 5.24, % of assets 25; recreation, beta 4.80, % of assets 20. Whats the firms weighted average beta