I NEED THE ST DEV O BOTH!!! I DO NOT NEED PART A ONLY PART B $!!!!!!!!!!!!!$ PLEASE READ OR YOU WILL BE DOWNVOTED FAST

Consider two local banks. Bank A has $80$ loans outstanding, each for $$1\mathrm{.}3$ million, that it expects will be repaid today Each loan has a $4\%$ probability of default, in which case the bank is not repaid anything. The chance of default is independent across all the loans. Bank B has only one loan of $$104$ million outstanding, which it also expects will be repaid today It also has a $4\%$ probability of not being repaid. Calculate the following:

b$.$ The standard deviation of the overall payoff of each bank A AND B