Commercial dredging operations in ancient rivers occasionally uncover archaeological artifacts of great importance. One such artifact is Bronze Age spearheads recovered from ancient rivers in Ireland. A recent study gave the following information regarding discoveries of ancient bronze spearheads in Irish rivers. River Bann Blackwater Erne Shannon Barrow No. of spearheads 21 10 15 36 14 (a) Make a Pareto chart for these data. 40 40 40 40 36 36 36 36 30 30 30 30 pearheads of Spearheads 21 20 8 20 No. of Spearheads No. of Spearheads of 15 15 NO. NO. 40 40 40 40 Blackwater Barrow Erne Bann Shannon AO Bann Barrow Blackwater Erne Shannon AO Shannon Eme Blackwater Barrow Bann AO Shannon Bann Erne Barrow Blackwater (b) Make a circle graph for these data. Shannon - 35.3% Shannon - 37.4% Shannon - 41.3% Shannon - 37.5% Bann - 25.9% Bann - 22.0% Bann - 21.9% Blackwater - 4.7% Blackwater - 6.5% - Bann - 20.7% Blackwater - 8.8% Blackwater - 10.4%- Barr - 16.5% Barr - 15.2% Erne - 17.6% Barr - 15.4% Erne - 16.5% Erne - 16.3% Barr - 14.6% Erne - 15.6% O