You are working late in your electronics shop and find that you need various resistors for a project. But alas, all you have is a big box of 10.0-Ω resistors. Show how you can make each of the following equivalent resistances by a combination of your 10.0-Ω resistors: 

(a) 35 Ω. 

(b) 1.0 Ω.

(c) 3.33 Ω.

(d) 7.5 Ω.