CHANCE VARIABILITY problems

Hi there,
I have a problem set I desperately need proper help with.l I need complete solutions for them please. I understand there are a number of answers to these questions on platforms such as chegg, coursehero, bartleby and others. I have reviewed most if not all and have not received the correct solutions. I ask only experts in this feild of statistics assist me in this critical time as I don’t have much time or room for incorrect or half slack solutions. Please only accept if you know you are 100% capable of responding with the CORRECT ANSWERS to each problem provided. I will be submitting the solutions and responding with feedback quickly after. If solutions are provided correctly for everything in timely manner I will be tipping generously
Thank you