A company manufactures running shoes and basketball shoes. The total revenue (in thousands of dollars) from x₁ units of running shoes and x₂ units of basketball shoes is

R = 5x₁² 8x₂² 2x₁x₂ + 34x₁ + 116x₂,

where x₁ and x₂ are in thousands of units. Find x₁ and x₂ so as to maximize the revenue.

x_1= _________

x_2= _______