Please answer all the question step by step

Question 4A [1 mark]: Map the OSI model layers to the TCP/IP suite layers. Write the complete name of each layer? Question 4B [1 mark]: Differentiate between the OSI reference model and TCP/IP protocol suite. Question 5A [1 mark]: Design a hybrid topology: a star backbone with three bus networks. Question 5B [1 mark]: Design a hybrid topology: a 3-node Mesh backbone with three Star networks. Question 5C [1 mark]: Design a hybrid topology: a 3-node Ring backbone with three Star networks (each has 4 nodes). Question 6 [1 mark]: Discuss and classify the key issues of Network criteria. Question 7 [ 2 mark]: Calculate the minimum total delay from sender to receiver (for both paths) if we send a 2GB file. The speed of link is 2.5108m/s. Each node has 2 microsecond processing delay and 3 millisecond queuing delay. Question 8A [2 mark]: Analyze how do packet delay and loss occur. Question 8B [2 mark]: Examine the difference between propagation delay and transmission delay