A researcher knew that before cell phones, a person made on average $2\mathrm{.}8$ calls per day. Hebelieves that the number of calls made per day today is higher. He selects a random sample of $30$ individualswho use a cell phone and asks them to keep track of the number of calls that they made on a certain day.The mean was $2\mathrm{.}9.$ At a $=0\mathrm{.}01,$ is there enough evidence to support the researcher's claim? The standarddeviation for the population found by a previous study is $0\mathrm{.}7.$ Assume that the variable is normallydistributed. Use the P$-$value method with tables.Part A : Find the critical value$($s$).$ Round the answer to two decimal places. If there is more than one criticalvalue, separate them with commas.Part B : Compute the test value. Always round Z score values to at leasT two Decimal places Part C: reject or fail to reject null hypothesis