The shaft is subject to bending from a forces on the wheels at b and d. draw the shear and moment diagrams for the member. assume the supports at a and c behave like simple supports (pin and roller). determine the values of the maximum shear and maximum moment.

Arandom sample of 15 observations is used to estimate the population mean. the sample mean and the standard deviation are calculated as 172 and 63, respectively. assume that the population is normally distributed. a. with 99 confidence, what is the margin of error for the estimation of the population mean? b. construct the 99% confidence interval for the population mean. c. construct the 95% confidence interval for the population mean. d. construct the 83% confidence interval for the population mean. hint: you need to use excel function =t.inv.2t to find the value of t for the interval calculation.