We analyze how the stock returns depends on the following variables. the firm's profits the variable name is profits the sector of activity of the firm: captured by 4 dummy variables: tech, banking, health, and manufacturing We run the following regression, return = 30 + B 1 profits + B 2 tech+B 3 health + B 4 manufacturing + u. What is the interpretation of B3? The impact that a firm in the sector health has on the return. The impact that a firm in the sector health has on the return compared to a firm in the sector banking, The impact that a firm in the sector banking has on the return compared to a firm in the sector health