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The accompanying data came from a study of collusion in bidding within the construction industry. No. Bidders | No. Contracts 2 6 3 20 4 24 5 17 6 12 7 8 8 5 9 7 10 2 11 LO USE SALT (a) What proportion of the contracts involved at most five bidders? At least five bidders? (Round your answers to four decimal places.) at most five bidders at least five bidders (b) What proportion of the contracts involved between five and 10 bidders, inclusive? Strictly between five and 10 bidders? (Round your answers to four decimal places.) between five and 10 bidders, inclusive strictly between five and 10 bidders (c) Construct a histogram/bar chart. 30 30 30 30 25 25 25 25 20 20 20 20 Frequency 15 Frequency 15 15 Frequency 15 Free 10 10 10 10 5/ 5 2 3 4 5 6 7 8 9 10 11 2 3 4 5 6 7 8 9 10 11 2 3 4 5 6 7 8 9 10 11 2 3 4 5 6 7 8 9 10 11 O Number of bidders Number of bidders DO Number of bidders Number of bidders Comment on interesting features. The distribution of number of bidders is [---Select-- v skewed, ranging from a low of bidders to a high of bidders, with a typical value of around 4-5 bidders