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Sandra uses two mobile cell phones( a digicel and a lime phone), to make her monthly calls. Sandra budget only $7000 on telephone calls per month and the cost per minute for digicel and lime are $5.00 and $7.00 respectively. a. Write down the algebraic equation for Sandra's budget constraint. b. Graph then Sandra's budget constraint. ( the budget constraint intercepts should be shown clearly on the graph) c. How will an increase in the cost per minute for digicel call affect the budget line's y_intercept, x-intercept and the slope?

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