from computer networks a system approach book

please answer the following ..

(Bandwidth-delay product): Calculate the bandwidth- delay product for the following links. Use one-way delay, and the only delay is speed-of-light (3x108 m/s) propagation delay.

(a) 2 Gbps Ethernet with a delay of 12 s. (b) 1.5-Mbps T1 link, with a delay of 6 ms. (c) 10 Mbps link through a satellite in geosynchronous orbit, 35,900 km high.

give full answers