Question 6 values = A=5, B = 5, C=7, D=-4 And if you fancy helping me out question 7 values are = A = 5.5 and T = 1.6

(a ) Find the rate of change of temperature, - as a function of radius. der (b) Find the value of the rate of change of temperature for r = R. 6. Integrate by substitution: (a) feltBar, (b) f sin(Ca + D)d.r. 7. The failure density function, f(t), for a class of electronic components is given by f(t) = Ae-Al The hazard function, h(t), is defined as f (t ) h(t) = 1 + fo f(x)dx (a) Determine the expression for h(t). (b) Find the value of h(t) for t = T