For this problem, enter your vectors with angle-bracket notation: < a, b, c >, not in ijk- notation. (a) F = 7xi + (8y – z2) j + (2x + 15z) k - F does not have a vector potential + H, H = none (If there is no potential function, enter none for the function.) (b) F = 7xi + (8y – z?) j + (2x – 15z) k + H, Ĥ = %3D F has a vector potential <0,-2,0> (If there is no potential function, enter none for the function.)

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