f R is the total resistance of three resistors, connected in parallel, with resistances R, R2, R3, then 1 1 R R. + 1 1 + R2 R3 If the resistances are measured in ohms as R = 82, R2 = 20 2, and R3 = 100 2, with a possible error of 0.5% in each case, estimate the maximum error in the calculated value of R. (Roun answer to three decimal places.)