Problem: Fifteen multimode glass fibers (n1 = 1.48, n2 = 1.46) are spliced together. Each fiber is 2 km long and has a loss rate 2-db/km. each splice adds 1 dB of loss. If the output power of the source is 5 dBm and radiates uniformly in a 60o half cone, how much power (in dBm) is delivered to the photo detector of this combined fiber? (Try to be precise)