(a) Derive Eq. (1.3) from Eq. (1.2), for general {M, , = 0, . . ....

(a) Derive Eq. (1.3) from Eq. (1.2), for general {Mαβ, α, β = 0, . . . , 3}.
(b) Since (s̅2 = 0 in Eq. (1.3) for any {(xi}, replace (xi by − (xi in Eq. (1.3) and subtract the resulting equation from Eq. (1.3) to establish that M0i = 0 for i = 1, 2, 3.
(c) Use Eq. (1.3) with (s̅2 = 0 to establish Eq. (1.4b). ((x, (y, and (z are arbitrary.)