speakeasy company offers customers a choice between 3 schemes:1st,a monthly charge of $15 + 5cents/ min.2nd,a monthly charge of $5 for the line rental +20 cents/min,3rd a(pay as you go) charge of 35cents/min with no monthly line rental charge. a)investigate the 3 schemes to find out which is the best one to choose. another company have simliar schemes,they charge a fixed monthly fee,plus a cost per minute for each call made.b) investigate the effect of using different schemes of this type of various amounts of minutes spent using the mobile phone per month
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