Question 4(a) CF ОН So COOH 1 II HII IV (i) Rank the bold-faced protons in order of increasing acidity. (ii) Explain your answer. Question 4(b) Draw one possible structure for each of the following compounds based on the descriptions below. (1) A compound with molecular formula C6H11 NO that includes alkene, secondary amine, and primary alcohol functional groups. (i) A compound with molecular formula CHgNO that has an arride functional group and does not have an alkene group. Question 4) The structure of A is shown below. HO. 3 -CH2CH=CH A (Predict the possible number of stereoisomers A can have. (i) Draw the 3D structure of the (2S, 3R, 59) enantiomer showing its correct stereochemistry. (i) Calculate the specific rotation of each enantiomer in a mixture containing 10 ml (0.10 M) of (2S, 3R, 59) enantiomer and 30 ml (0.10 M) of (28, 35,5R) enantiomer. Given the specific rotation of the mixture = +4.8°.