Questions 1 and 3 are the ones im having a hard time with

Question 1 1 pts Find the global minimum of the function f (x) = 1 + x2 on the interval (-oo, oo) . Write DNE is there is no global minimum. Question 2 1 pts Find the global maximum of the function f (x) = 1 + x2 on the interval (-oo, oo) . Write DNE is there is no global max. DNE Question 3 1 pts Find the global minimum of the function f (x) = 1 + x2 on the interval [1, 10] . Write DNE is there is no global minimum. Question 4 1 pts Find the global minimum of the function f (x) = 1 + x2 on the interval (0, oo) . Write DNE is there is no global minimum. DNE