Would you help me to answer this question? (based on English Law)

A) "An employer owes many obligations to their employees and employees have wide range of rights, although some of these rights only exist if an employee has worked for their employer for a period of time". Discuss the extent to which this statement is true. (50 marks)

B) Tara has been Mohammad's employee for 13 years; Bob has worked for Mohammed for 1 year. Mohammad decides to dismiss them.

Their contracts state that they are entitled to 3 weeks' notice.

With reference to statute advise Mohammad how much notice each is entitled to receive and what legal action may he face if he fails to give the correct notice period.