hat is the flexural stress of a 5mm diameter cylindrical ceramic specimen pjected to 275N load in a three-point loading test where the distance tween support is 45mm? 252 MPa

Please do the last three questions (2, 3 and 4)! Thank you in advance!  A seesaw that weights 45lbs and its 5m long is balanced on the fulcrum in the center.  1- Two children are sitting on opposite sides of each other on the seesaw. One child weights 50lbs and is sitting 0.7m on the left end. Where should the other child sit in order to be balanced on the seesaw if they weigh 42lbs?  2- Now, a third child wants to sit on the seesaw and weighs 30lbs and is sitting 1.25m in front of them and is closer to the fulcrum on the right side. What are the CW and CCW moment of the seesaw now? What is the net moment and direction?  3- Then, a fourth child wants to play on the seesaw and is on the left side of the plank in order to bring the system to equilibrium. How much does the child weigh (Calculate the pounds of force needed in order for rebalance?)  4- Now the fourth child leaves the other three children sitting on the plank. If the three children are sitting in the same potions as they did…

Can someone please help me to solve the following question following all instructions and drawing needed table and diagrams and showing all work neatly. Please and Thank you!!

Problem-AA: Consider the following system of equations: -123 = 1.5a + 25n 5 = -21a +n Calculate the two unknows.