Work on the section of the line: Caracas-Guyana-Lituania-Mxico- Merida in Figure 1. All sections are overhead. There is an average of failures in the last 10 years: FAULTS Caracas-Guyana-2 f per (mill./10)years Guyana -Lituania 1 f per (mill./10)years Lituania- Mxico 3 f for (mill./10)years Mxico-Merida 4 f per (mill./10)yr. The line has a termination point in Merida. The annual cable termination failure rate is given as 0.5% per cable termination. On average, the repair times are: REPAIR TIME (hours) Caracas-Guyana 4 Guyana-Lituania 6 Lituania - Mxico8 Mxico-Merida 15 for cable termination 20 h. Calculate: (a) Line unavailability. b) Line availability.