Using the attached info, can you kindly help me compute the problems below?

Formulate the null and alternative hypotheses for this application.

Excel template , Saved / File Home Insert Draw Page Layout Formulas Data Review View Help 9v av a _ 3 v w Av i iv a E 1: D4 V X \\/ fx A A B c E F 1 Call Time (minutes) Hypothesis Test about a Population Mean: Formulas 2 20.3 Sigma Known Case 3 13.7 5 18.1 Sample Mean 6 13.9 7 17.3 Hypothesized Mean Value 15 8 14.6 Population Standard Deviation 3.7 9 17.4 10 18.5 11 9.7 Level of Signicance 0.01 12 15.1 13 16.6 Standard Error 14 17 Critical Value 15 14.5 Test Statistic (z) 16 19.4 17 11.3 p-value (Lower Tail) 18 16.3 p-value (Upper Tail) 19 20.5 pvalue (Two Tail) 20 21.7 21 15.5 RejecmunHypomesis? 22 12.2 23 18.5 Data range A:A 24 25.9 25 14.5 26 21.6 27 15.6 28 15.9 29 14.7 30 17.6 31 18 32 16.7 33 11.6 34 16.8 35 13 36 13.2