I require solution for question 7 and 8. The questions are below.

Q. 7: M14) A machine produces 15% defective bolts. 350 bolt produces by the machines are randomly selected. What is the probability that; (i) 50 or more are defective? (ii) Less than 30 bolts are defective? (iii) Exactly 45 bolts are defective o. 3: M14) Environtech Engineering, a company that specializes in the construction of antipollution filtration devices, has recorded the following sales record over the last 9 years: Year 1987 1988 1989 1990 1991 1992 1993 1994 1995 Sales {1: 100,000} 13 15 19 21 27 35 47 100 1257 a] Plot these data. bl Develop the linear estimating equation that best describes these data, and plot this line on the graph from part (a). c) Develop the second-degree estimating equation that best describes these data, and plot this curve on the graph from part (a). d) Does the market to the best of your knowledge favor (b) or (c) as the more accurate estimating method