Please show all steps and make sure to plot the probability distribution functions as well. Thank you!

2. Chains \"A\" and \"B\" are made of the same steel. \"A\" consists of three links and \"B\" consists of six links. each link having a normal distribution function of the resisting strength with a mean of 60,000 psi and standard deviation of 5,000 psi. Determine which chain is generally weaker (from a probabilistic point of View) by plotting the probability distribution functions of their resisting strengths on the same diagram