Question 3 (a) Consider the following Bitcoin block. 00000000 01 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00000 010 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00000020 00 00 00 00 3B A3 ED FD 7A 7B 12 B2 7A C7 2C 3E 00000030 67 76 8F 61 7F C8 1B C3 88 8A 51 32 3A 9F DB AA 00000040 4B 1E 5E 4A 29 AB 5F 49 FF FF 00 1D 1D AC 2B 7C 00000050 01 01 00 00 00 01 00 00 00 00 00 00 00 00 00 00 00000060 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00000070 00 00 00 00 00 00 FF FF FF FF 4D 04 FF FF 00 1D 00000080 01 04 45 54 68 65 20 54 69 6D 65 73 20 30 33 2F 00000090 4A 61 6E 2F 32 30 30 39 20 43 68 61 6E 63 65 6C 00000 0AO 6C 6F 72 20 6F 6E 20 62 72 69 6E 6B 20 6F 66 20 00000 0BO 73 65 63 6F 6E 64 20 62 61 69 6C 6F 75 74 20 66 6F 72 20 62 61 6E 6B 73 FF FF FF FF 01 00 F2 05 00000 0DO 2A 01 00 00 00 43 41 04 67 8A FD BO FE 55 48 27 00000 0EO 19 67 F1 A6 71 30 B7 10 5C D6 A8 28 E0 39 09 A6 00000 0FO 79 62 EO EA IF 61 DE B6 49 F6 BC 3F 4C EF 38 C4 00000100 F3 55 04 ES 1E C1 12 DE SC 38 4D F7 BA OR 80 57 00000110 BA 4C 70 2B 6B F1 1D SF AC 00 00 00 00 How many transactions are included in this block? (2 Mark) What is the height of this block? (2 Marks) Suppose your computer can evaluate 2" hashes per second, estimate how long it takes for your computer to find a new block after this block. (3 Marks) (b) Give one difference between Chaum's electronic cash and Nakamoto's Bitcoin. (2 Marks)