Superior Construction Pte Ltd is a successful company dealing with many major projects in Singapore. Recently, it has submitted its bidding for two major government projects. Project A worth about $120 million and the company believes it has 40% chance of securing the project. Project B worth $1.8 billion and there is 30% chance the company can win the project. Both projects are independent of each other. What is the probability that the company:
a) will secure Project A or B but not both
b) will not secure Project A or will not secure Project B