Question #$7$: employee$\_$update$($d$,$ bonus, year$)10$ ptsModifies the given dictionary d by adding another key:value assignment for all employees butwith a bonus for the next year. You can assume the previous year exists in the dictionary.Preconditions and Postconditionsd: dictbonus: int$/$floatyear: intReturns: dict $->$ adds the key:value pair with bonus appliedRecommended methods: dict.keys$(),$ returns all the keys in a dictionaryo D $=\{\text{'}$one$\text{'}$:$1,$ 'two':$2,$ 'three':$3,$ 'four':$4\})$o D$.$keys$()$ returns $[\text{'}$one$\text{'},$ 'two', 'three', 'four'$]$ List concatenation $(+)$ or append methodTip: Dictionaries, just like lists, are mutable, so saving a reference to a dictionary, say x$=$d$[2020],$mapping x to another key in d and then changing information in x$,$ will also change the data ind$[2020],$ which is not a desirable behavior. When adding a new key, create new dictionaries andlists and populate them with the required data.Examples:$>>>$ records $=\{2020$:$\{"$John$"$:$["$Managing Director","Full$-$time",$65000],$"Sally":$["$HR Director","Full$-$time",$60000],$"Max":$["$Sales Associate","Part$-$time",$20000]\},2021$:$\{"$John$"$:$["$Managing Director","Full$-$time",$70000],$"Sally":$["$HR Director","Full$-$time",$65000],$"Max":$["$Sales Associate","Part$-$time",$25000]\}\}>>>$ employee$\_$update$($records$,7500,2022)\{2020$: $\{\text{'}$John$\text{'}$: $[\text{'}$Managing Director', 'Full$-$time', $65000],$ 'Sally': $[\text{'}$HR Director', 'Full$-$time', $60000],$ 'Max': $[\text{'}$Sales Associate', 'Part$-$time', $20000]\},2021$: $\{\text{'}$John$\text{'}$: $[\text{'}$Managing Director', 'Full$-$time', $70000],$ 'Sally': $[\text{'}$HR Director', 'Full$-$time', $65000],$ 'Max': $[\text{'}$Sales Associate', 'Part$-$time', $25000]\},2022$: $\{\text{'}$John$\text{'}$: $[\text{'}$Managing Director', 'Full$-$time', $77500],$ 'Sally': $[\text{'}$HR Director', 'Full$-$time', $72500],$ 'Max': $[\text{'}$Sales Associate', 'Part$-$time', $32500]\}\}$Question #$8$: overloaded$\_$add$($d$,$ key, value$)5$ ptsGiven a dictionary d$,$ a key, and a value, this function adds the key:value pair to the dictionary d$.$If the key doesnt already exist in the dictionary, this function should simply add it$.$ However, ifthe key already exists, then rather than overriding the previous value, the dictionary should startkeeping a list of values for that key, in the order they are added.Preconditions and Postconditionsd: dict $->$ You cannot make any assumptions about the size or contents of dkey: any immutable typevalue: anyReturns: None