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Testing of hypothesis - Chi square

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A) 100 students were classified according to their interest in statistics and their evaluation of the course. The results are tabulated below:
HIGHLY INTERESTED INTERESTED INDIFFERENT NOT INTERESTED
EXCELLENT 15 12 10 5
GOOD 10 10 5 5
ACCEPTABLE 5 10 8 5
Is there any evidence of association between interest in the topic and course evaluation?

b) The marks obtained by the groups of students are given below:
MARK <=40 41-50 51-60 61-70 71-80 81-90 91-100
FREQUENCY 5 10 35 22 15 8 5

Fit a normal distribution to this data and test for goodness of fit.

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