hello chegg please help me to solve the following questions. I tried it so manh times and I do my best to solve this but at the end I am not really sure for my answers. I want to make sure that I got the correct answer. Please provide the correct solutions including the formula and so on. This is very important to me I need to solve this today I hope you can help me to this. Please. Thank you. I really need you please.

Hydrogen iodide gas decomposes into gaseous hydrogen and iodine with a rate constant of 0.031/M.s at 400 C. a) What is the half-life of the reaction if the initial concentration of HI is 0.045 M? Will the halflife be different if the initial concentration is 0.025 M? Justify your answer. b. How much Hi (in M) remains after 5 minutes if it started with 0.045 M? c. How many minutes will it take for the concentration of HI to decrease from 0.045 to 0.015? d. How long will it take to reach 80% conversion