2.6.7) Computer keyboard failures are due to faulty electrical connects (18%) or mechanical defects (82%). Mechanical defects are related to loose keys (25%) or improper assembly (75%). Electrical connect defects are caused by defective wires (40%), improper connections (10%), or poorly welded wires (50%). (a) Find the probability that a faiure is due to improper assembly? (b) Find the probability that a failure is due to defective wires or improper connections. (c) Find the probability that a failure is due to loose keys or improper assembly. 2.6.11) A Web ad can be designed from five different colors, four font sizes, two images, and four text phrase. A specific design is randomly generated by the Web server when you visit the site. (a) Determine the probability the add color is blue and the font size is not the largest one. (b) Determine the probability that the add image is the first one and the text phrase is also the first one