$($a$)$ A software development manager decided to include all software developers in doing alpha testing at the end of every sprint cycle. In three or fewer sentences give advantage$($s$)$ and disadvantages of this decision.

$($b$)$ A software developer developed a function$/$method which contains six sequential if statements that accepts six Boolean inputs. With the assumption of each condition evaluates a single unique input, how many minimum number of test cases are required to achieve $100\%$ path coverage? Justify your answer