By Lawrence Matheson Amazon has posted robust results for Q1, bolstered by its cloud-computing unit and advertising revenue from its Prime Video streaming service. The Seattle-based e-commerce giant racked up revenues of $143.31billion in the first quarter, marking a 13% rise compared to the same period last year. Its net income reached $10.43billion, equating to 98 cents per share, significantly smashing Wall Street expectations of 84 cents a share, according to FactSet data. “It was a good start to the year across the business, and you can see that in both our customer experience improvement…