I couldn't figure out this homework exercise for my biostats class

Translation:

Percutaneous anephrolithotomy (PN) is a surgical procedure to remove a kidney stone by a small puncture through the skin. The authors of an article in the British Medical Journal [14] investigated the effectiveness of NP in the removal of renal calculi. less than 2mmaprestroismois.LaNP was a success for289 of the 350 patients who underwent the treatment. Traditionally, surgery has opened up to 78%.

(a) Give a point estimate for the success rate of PN in the processing of kidney stones and give the corresponding estimated standard error.

b) Is there any significant evidence that the rate of NP in the processing of renal calculations is different from the course of the open surgery? (Formulate a null hypothesis and an alternative hypothesis and find the corresponding p-value.) Use ? = 0.01.

(c) Use a 95% confidence interval to compare the NPP success rate in the treatment of renal calculi at the back of open surgery successes.

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