The average daily crime rate in a town depends on the number of policemen assigned a duty. The function describing this relationship is given as: N=500-10xe 0.025x Where N equals theaverage daily crime rate and x equals the number of policemen assigned a duty. Required: i. Determine the number of policemen to assign to duty in order to minimize daily crime rate and ensure it is minimum. (7 marks) ii. Determine the average daily crime rate. (4 marks)