(WITHOUT RESTRICTIONS OPTIMIZATION) 1) The monthly incomes of a travel agency are INCOME(x,y)= -x^2-frac{y^2}{2}+xy+8x+3y+20, which depends on the

(WITHOUT RESTRICTIONS OPTIMIZATION)

1) The monthly incomes of a travel agency are INCOME(x,y)= -x^2-frac{y^2}{2}+xy+8x+3y+20, which depends on the amount of money invested in marketing 'X' and the number of employees hired 'Y'.

Determine the amount of money or quantity that the travel agency should spend in marketing and how many employees should hire to maximize its benefits(more income).