Problem 5. Wages of manual workers in a large industry have a bell-shaped distribution with a mean value of 1,500 dirhams per week with a standard deviation of 150 dirhams. a. (1.5 points) What fraction of wages is between 1200 dirhams and 1800 dirhams? Show your work by drawing a bell-shaped distribution that includes your answer. b. (1.5 points) What fraction of wages is above 1,650 dirhams, and what fraction is above 1,350 dirhams? Show your work by drawing a bell-shaped distribution that includes your answers.