For Hope, who is interested in researching someone who worked with computers, Vinton Cerf would be the best fit. Vinton Cerf is often referred to as one of the "fathers of the internet." He co-developed the TCP/IP protocols, which are fundamental to the functioning of the internet. His contributions have had a significant impact on computer science and internet technology, making him a relevant figure for Hope's research project.
While Thomas Edison made important contributions to science and technology, he is not specifically known for work with computers. John Cornforth is a chemist, and Olaf Hassal is less well-known in the context of computer contributions. Therefore, Vinton Cerf is the most appropriate choice for Hope's interests.