please answer B The following tasks are to be performed on an assembly line: The workday is $\backslash (7\mathrm{.}4\backslash )$ hours long. The demand for completed product is $720$ per day. a$.$ Find the cycle time required to meet the desired output rate. Note: Round your answer to $1$ decimal place. b$.$ What is the theoretical number of workstations required to meet the desired output rate? Note: Round up your answer to the next whole number. What is the theoretical number of workstations required to meet the desired output rate? Balance the line using sequential restrictions and the longest operating time rule.