. In this question you will be asked to construct new kernels from existing kernels. Suppose K (x,z): R x Rd R and K (x,z): Rd x Rd R are both kernels, show the following functions are also kernels: (10 points) a) K(x,z) = cK (x, z) + CK(x, z) with C, C 0. b) K(x, z)= K(x, z). K (x, z)