Select the correct statement{s] by referring to the two graphs below where the gradient vector of the function z:f(x,y} is shown at point A (graph A} and at point B [graph B]. GRAPH A Se ect one or more: H a. At point A [graph A] the function is increasing in y. _ b. At point A (graph A] the function is decreasing in y. : c. At point A (graph A] the function is decreasing in x. _ d. At point B {graph B) the function is increasing in x. _ e. At point B [graph B] the function is increasing in y. _ 1'. At point B [graph 3] the function is decreasing in y. _ 9. At point A {graph A] the function is increasing in x. _ h. At point B (graph B} the function is decreasing in x