please answer quick!!

55% probiblity that the frim will have a 7% retum. What is the volatily (standard deviation) of a pertholio that consibts of an equal inwostreent in a. 31 firms of type 5 ? b. 31 fems of type 1 ? a. What is the volasily (utandard deviakon) of a portolio that conshis of an equal investment in 31 finss of typo S? Stanctard devatian is (F. (Round to two deomal places) b. What in the yolatily (ctandard devation) of a portotio that consista of an equal inveatment in 31 frms of type 17. - Standard deviation is (R) Roune to two decimal places)