How to create the codes of the following two functions below?

unique_values(a_dict:dict)-> dict

This function will receive a single dictionary parameter known as a_dict.a_dict will contain a single letter as a string and numbers as values. This function is supposed to search a_dict to find all values that appear only once in the a_dict. The function will construct another dictionary named to_ret. For all values that appear once ina_dict the function will add the value as a key in to_retand set the value of the key to the key of the value ina_dict (swap the key-value pairs, since a_dict contains letters to numbers, to_retwill contain Numbers to Letters). Finally, the function should returnto_ret.

Example:

a_dict: {'X': 2, 'Y': 5, 'N': 2, 'L': 2, 'W': 1, 'G': 0, 'R': 1}

Expected: {5: 'Y', 0: 'G'}

a_dict: {'Z': 3, 'P': 3, 'E': 2, 'G': 0, 'T': 5, 'L': 1, 'Q': 0}

to_ret: {2: 'E', 5: 'T', 1: 'L'}

a_dict: {'E': 3, 'X': 3}

to_ret: {}

a_dict: {'G': 3, 'D': 3, 'C': 4, 'Q': 1, 'H': 1, 'M': 2, 'Z': 1, 'W': 3}

to_ret: {4: 'C', 2: 'M'}

a_dict: {'O': 2, 'T': 1, 'L': 5, 'W': 5, 'Z': 4, 'M': 5, 'B': 4, 'D': 0, 'F': 3, 'E': 1}

to_ret: {2: 'O', 0: 'D', 3: 'F'}

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dict_from_string(dict_str:str)->dict

This function will be given a single parameter, a string representing a dictionary. Your job is to convert the string into an actual dictionary and return the dictionary. Make sure all key-value pairs in the string exist in the newly created dictionary. The string will contain only numbers or single letters as key values pairs. Make sure all letters are kept as strings and all numbers are converted to integers in the newly created dictionary.

Example:

String Input: '{9: 'V', 'G': 0, 'M': 9, 'u': 3, 2: 'o', 8: 'u', 'q': 9, 'D': 1}'

Expected: {9: 'V', 'G': 0, 'M': 9, 'u': 3, 2: 'o', 8: 'u', 'q': 9, 'D': 1}

String Input: '{10: 'D', 1: 'Z', 5: 'a'}'

Expected: {10: 'D', 1: 'Z', 5: 'a'}

String Input: '{'M': 2, 'V': 0, 3: 'x', 6: 'J', 5: 'J', 7: 'T', 8: 'P', 4: 'q', 1: 'h'}'

Expected: {'M': 2, 'V': 0, 3: 'x', 6: 'J', 5: 'J', 7: 'T', 8: 'P', 4: 'q', 1: 'h'}

String Input: '{3: 'D', 10: 'T', 7: 'm', 'u': 9, 't': 5, 6: 'Z', 'H': 10, 'B': 6}'

Expected: {3: 'D', 10: 'T', 7: 'm', 'u': 9, 't': 5, 6: 'Z', 'H': 10, 'B': 6}

String Input: '{'q': 10, 6: 'O', 'm': 6}'

Expected: {'q': 10, 6: 'O', 'm': 6}

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Thank you so much!!