Question 3 /5 pointsl Kernel foundations In class, we stated that If a kernel matrix [K(xi, xj)]ij is symmetric and PSD (positive semi-definite) then it can be expressed as K(x,y-D(x)(y), for some function (-) into a vector space. Here, you need to prove the other (easier) way If K(x,y) (x)9(y) for some function (-) into a vector space, then the matrix [K (xi, xj)ij is symmetric and PSD Question 3 /5 pointsl Kernel foundations In class, we stated that If a kernel matrix [K(xi, xj)]ij is symmetric and PSD (positive semi-definite) then it can be expressed as K(x,y-D(x)(y), for some function (-) into a vector space. Here, you need to prove the other (easier) way If K(x,y) (x)9(y) for some function (-) into a vector space, then the matrix [K (xi, xj)ij is symmetric and PSD