write python code for the following:

 

Consider the following dictionary that stores students scores

scores={"Math":[{"Alice":80},{"Bob":95},{"Charlie":60},{"David":75}],"Science":[{"Alice":84},{"Charlie":80},{"Aria":100},{"Frank":55},{"Eve":86}],"Python":[{"Bob":91},{"David":75},{"Eve":72},{"George":89}]}

 

(1) Calculate the percentage of students who have registered more than one course.

(2) Convert students scores to letter grades according to the following criteria:• students get A if their score is equal or higher than 90• students get B if their score is equal or higher than 80 and lower than 90• students get C if their score is equal or higher than 60 and lower than 80• students get D if their score is lower than 60