Help please!

Exercise. Suppose a component that performs a certain task comes in two models, Type 1 and Type 2. -t/50 -t/6O The reliability functions for these are e and e respectively. (The more reliable Type 2 is more expensive, which is why networks sometimes mix the two.) A. Suppose a Type 1 component and a Type 2 component are connected in a series. Find the reliability function for the combination and its expected mean failure. B. Suppose a Type 1 component and a Type 2 component are connected in parallel. Find the reliability function for the combination and its expected mean failure