Final answer:
To calculate the capacitance-to-neutral, typically the formula C = ε₀ * (A/d) is used, with ε₀ being the permittivity of free space. The admittance-to-neutral is the inverse of reactance for a capacitor, found using the formula Y = 1/(2πfC). Without further data from the problem question, direct calculation is not possible.
Step-by-step explanation:
To calculate the capacitance-to-neutral in f/m (farads per meter) without the effect of the earth plane for a three-phase line, standard formulas for the capacitance of parallel plate capacitors can be applied. However, sufficient data from problem 4.10 is not provided here to directly calculate the value. Normally, the capacitance could be calculated using the formula C = ε₀ * (A/d), where ε₀ is the permittivity of free space (ε₀ = 8.85 × 10^-12 F/m), A is the area of one plate, and d is the distance between the plates.
The admittance-to-neutral in s/km (siemens per kilometer) can be calculated if the capacitance is known since admittance (Y) is the inverse of the reactance (Xc), and for a capacitor, Xc = 1/(2πfC), where f is the frequency. Once the capacitance is calculated, you can find the admittance by taking the inverse of the reactance (Y = 1/Xc).