A rock concert promoter has scheduled an outdoor concert on July 4th. If it does not rain, the promoter will make $30,000. If it does rain, the promoter will lose $15,000 in guarantees made to the band and other expenses. The probability of rain on the 4th is 4. (a)What is the promoter's expected profit? Is the expected profit a reasonable decision criterion? (Round your answers to 1 decimal place. Omit the "S" sign in your response.) 30,000 P(X) -15,000 Hx (Click to select) the expected profit (Click to select a reasonable decision criteria (b) How much should an insurance company charge to insure the promoter's full losses? (Omit the "S" sign in your response.) At least $