Thank you for your help!

Exercise 6 The prices of inputs (x1; x2; x3; x4) are (4; 'l; 3; 2) ('I) If the production function is given by f(x'|, x2) = min{x1, k2}, what is the minimum cost of producing one unit of output? (2) If the production function is given by f(x3, x4) = x3 + x4, what is the minimum cost of producing one unit of output